> ## Documentation Index
> Fetch the complete documentation index at: https://help.airbridge.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting - Unreal SDK

<h2 id="ios">
  iOS
</h2>

<AccordionGroup>
  <Accordion title="[Xcode 27] SceneDelegate Migration Required — Additional Setup Needed for Airbridge Deep Links">
    <div id="attention" />

    <Note>
      **Attention**

      This troubleshooting guide is for customers who need to migrate an existing AppDelegate-based app to UIScene(SceneDelegate) lifecycle.
    </Note>

    ### **Symptoms**

    * When an app built with Xcode 27 is launched, the app may not run properly.
    * Airbridge deep link events are not collected even when the app is opened through a scheme deep link or Universal Link.
    * The app does not work even though the code was added to `AppDelegate` as shown in the [Initialize SDK](/en/developers/unreal-sdk-v4#initialize-sdk) and [Collect deep link events in your app](/en/developers/unreal-sdk-v4#set-up-deep-linking) developer guide examples.

    ### **Cause**

    Apple is moving the app lifecycle from the `UIApplicationDelegate`-only AppDelegate model to the `UIScene`-based SceneDelegate model, and adopting the Scene lifecycle has effectively become required in the latest Xcode and iOS environments.

    When an app adopts the Scene lifecycle through `UIApplicationSceneManifest`, the following `AppDelegate` deep link callbacks are **no longer called.**

    ### Solution

    Airbridge Unreal SDK versions earlier than 4.10.0 do not provide a public interface for calling Airbridge deep links. Update Airbridge Unreal SDK to 4.10.0 or later, and then call Airbridge deep links from SceneDelegate.

    #### 1. Add Scene Manifest to Info.plist

    Add the following Scene configuration to Info.plist in the Xcode project through UPL.

    ```xml lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    <?xml version="1.0" encoding="utf-8"?>
    <root xmlns:android="http://schemas.android.com/apk/res/ios">
      <!-- init section is always evaluated once per architecture -->
      <init>
      </init>
    	<iosPListUpdates>
    		<addElements tag="dict" once="true">
    			<key>UIApplicationSceneManifest</key>
    			<dict>
    				<key>UIApplicationSupportsMultipleScenes</key>
    				<false/>
    				<key>UISceneConfigurations</key>
    				<dict>
    					<key>UIWindowSceneSessionRoleApplication</key>
    					<array>
    						<dict>
    							<key>UISceneConfigurationName</key>
    							<string>Default Configuration</string>
    							<key>UISceneDelegateClassName</key>
    							<string>MyScene</string>
    						</dict>
    					</array>
    				</dict>
    			</dict>
    		</addElements>
    	</iosPListUpdates>
    </root>

    ```

    #### 2. Create SceneDelegate and add deep link collection code

    Create a SceneDelegate file that matches the `UISceneDelegateClassName` added to Scene Manifest.

    ```objective-c lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    @interface MyScene : UIResponder <UIWindowSceneDelegate>

    @property (strong, nonatomic) UIWindow *window;

    @end

    @implementation MyScene

    - (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions
    {
        if ([NSThread isMainThread]) {
            if (![scene isKindOfClass:[UIWindowScene class]]) {
                return;
            }

            UIWindowScene *windowScene = (UIWindowScene *)scene;

            if (self.window.windowScene == windowScene) {
                [self.window makeKeyAndVisible];
                return;
            }

            UIWindow *sceneWindow = [[UIWindow alloc] initWithWindowScene:windowScene];

            if (self.window.rootViewController) {
                sceneWindow.rootViewController = self.window.rootViewController;
            }

            self.window = sceneWindow;
            [self.window makeKeyAndVisible];

            return;
        }

        dispatch_sync(dispatch_get_main_queue(), ^{
            if (![scene isKindOfClass:[UIWindowScene class]]) {
                return;
            }

            UIWindowScene *windowScene = (UIWindowScene *)scene;

            if (self.window.windowScene == windowScene) {
                [self.window makeKeyAndVisible];
                return;
            }

            UIWindow *sceneWindow = [[UIWindow alloc] initWithWindowScene:windowScene];

            if (self.window.rootViewController) {
                sceneWindow.rootViewController = self.window.rootViewController;
            }

            self.window = sceneWindow;
            [self.window makeKeyAndVisible];
        });
    }
    ```

    #### 3. Add deep link collection code

    Implement the following code in the created SceneDelegate to collect Airbridge deep links.

    ```objective-c lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    #import "AirbridgeUnrealDelegate.h"

    - (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions
    {
        /* ... Scene Initialize Codes ... */    

        if (![scene isKindOfClass:[UIWindowScene class]]) {
            [IOSAppDelegate trackDeeplinkWithConnectionOptions:connectionOptions];
            return;
        }

        [IOSAppDelegate trackDeeplinkWithConnectionOptions:connectionOptions];
    }

    - (void)scene:(UIScene *)scene openURLContexts:(NSSet<UIOpenURLContext *> *)URLContexts
    {
        [IOSAppDelegate trackDeeplinkWithOpenURLContexts:URLContexts];
    }

    - (void)scene:(UIScene *)scene continueUserActivity:(NSUserActivity *)userActivity
    {
        [IOSAppDelegate trackDeeplinkWithUserActivity:userActivity];
    }
    ```
  </Accordion>

  <Accordion title="The domain of saved passwords appears as airbridge.io or abr.ge">
    #### Problem

    Users may see the domain of passwords stored with the [Password AutoFill](https://developer.apple.com/documentation/security/password-autofill) feature as airbridge.io or abr.ge.

    #### Cause

    After setting up deep links for the Airbridge SDK, if you utilize the Password AutoFill feature, the domain is saved as the applinks domain of the Airbridge deep link, which is airbridge.io or abr.ge.

    #### Solution

    The problem can be solved by setting up the webcredentials domain used in the Password AutoFill.

    1. Prepare the domain that will store the password.

    2. Host the JSON below at `https://YOUR_DOMAIN/.well-known/apple-app-site-association` with `Content-Type: application/json`. Your prepared domain should be entered instead of `YOUR_DOMAIN`.

    You can find the App ID Prefix and Bundle ID in the **\[Identifiers]>\[YOUR\_APP]** menu of the [Apple Developer Portal](https://developer.apple.com/account/resources).

    ```json lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    {
        "webcredentials": {
            "apps": ["YOUR_APP_ID_PREFIX.YOUR_BUNDLE_ID"]
        }
    }
    ```

    3. Navigate to **\[YOUR\_PROJECT]>\[Signing & Capabilities]** in Xcode.

    4. Click **+ Capability** to add Associated Domains. Enter `webcredentials:YOUR_DOMAIN` in Associated Domains.
  </Accordion>

  <Accordion title="Upload Symbol Failed on Xcode">
    #### Problem

    Upon uploading the app to the App Store, Xcode displays a warning message that a dSYM for the Airbridge framework was not included.

    #### Cause

    The Airbridge iOS SDK does not support dSYM.

    #### Solution

    The dSYM will be supported in the coming update. You may ignore this warning.
  </Accordion>
</AccordionGroup>

<h2 id="android">
  Android
</h2>

<AccordionGroup>
  <Accordion title="A coroutine dependency error occurs during the build process">
    #### Issue

    A coroutine dependency error occurs during the build process with the following message.

    ```html Text lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    java.lang.NoClassDefFoundError: kotlin/coroutines/AbstractCoroutineContextKey
        at java.base/java.lang.ClassLoader.defineClass1(Native Method)
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
      ...
    ```

    #### Cause

    If the kotlinx-coroutines-core library version is 1.3.5 or later, [the kotlin-stdlib library version must be at a certain level or later](https://github.com/Kotlin/kotlinx.coroutines/issues/1879).

    #### Solution

    Check whether the kotlin-stdlib library version is v.1.3.70 or later with the `gradlew dependencies` command. If the version is earlier than v.1.3.70, you need to update it.
  </Accordion>

  <Accordion title="Deeplink Opens generated through push notifications using the Braze SDK are not collected">
    #### Issue

    Deeplink Open events that occur through the push notifications generated by the Braze SDK are not collected by Airbridge. Instead, the App Open event is collected.

    #### Cause

    The Airbridge Android SDK uses the `dataString` in the `action` and `intent` of the `Activity` to distinguish between Deeplink Open events and App Open events.

    When a user opens the app through a push notification using the Braze SDK, the app goes through `NotificationTrampolineActivity`. This activity handles push notifications, but the `dataString` is not included in its `action` and `intent`, preventing the SDK from determining if it's a Deeplink Open event or an App Open event.

    #### Solution

    Add a custom Application class (`CustomApplication.java`) file as shown below.

    <CodeGroup>
      ```java Unreal Engine v4 lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
      package com.company.product;

      import android.app.Activity;

      import com.epicgames.ue4.GameApplication;

      import org.jetbrains.annotations.Nullable;
      import org.jetbrains.annotations.NotNull;

      import co.ab180.airbridge.AirbridgeLifecycleIntegration;
      import co.ab180.airbridge.ue.AirbridgeUnreal;

      public class CustomApplication extends GameApplication {

          @Override
          public void onCreate() {
              super.onCreate();

              AirbridgeUnreal.setLifecycleIntegration(new AirbridgeLifecycleIntegration() {

                  @Nullable
                  @Override
                  public String getDataString(@NotNull Activity activity) {
                      if (activity.getClass().getName().equals("com.braze.push.NotificationTrampolineActivity")
                              && activity.getIntent() != null
                              && activity.getIntent().getExtras() != null
                      ) {
                          return activity.getIntent().getExtras().getString("uri");
                      }
                      return null;
                  }
              });
          }
      }
      ```

      ```java Unreal Engine v5 lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
      package com.company.product;

      import android.app.Activity;

      import com.epicgames.unreal.GameApplication;

      import org.jetbrains.annotations.Nullable;
      import org.jetbrains.annotations.NotNull;

      import co.ab180.airbridge.AirbridgeLifecycleIntegration;
      import co.ab180.airbridge.ue.AirbridgeUnreal;

      public class CustomApplication extends GameApplication {

          @Override
          public void onCreate() {
              super.onCreate();

              AirbridgeUnreal.setLifecycleIntegration(new AirbridgeLifecycleIntegration() {

                  @Nullable
                  @Override
                  public String getDataString(@NotNull Activity activity) {
                      if (activity.getClass().getName().equals("com.braze.push.NotificationTrampolineActivity")
                              && activity.getIntent() != null
                              && activity.getIntent().getExtras() != null
                      ) {
                          return activity.getIntent().getExtras().getString("uri");
                      }
                      return null;
                  }
              });
          }
      }
      ```
    </CodeGroup>

    Add a custom application class to the Android Manifest file using Unreal Plugin Language (UPL), as shown below.

    ```xml lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    <?xml version="1.0" encoding="utf-8"?>
    <root xmlns:android="http://schemas.android.com/apk/res/android">
    	
        <prebuildCopies>
            <copyDir src="$S(PluginDir)/..." dst="$S(BuildDir)/src/com/company/product" />
        </prebuildCopies>
        
    	<androidManifestUpdates>
    		<addAttribute tag="application" name="android:name" value="com.company.product.CustomApplication"/>
    	</androidManifestUpdates>
    	
    </root>
    ```
  </Accordion>

  <Accordion title="The &#x22;Manifest merger failed&#x22; error occurrs during the build process">
    #### Issue

    The "Manifest merger failed" error occurrs during the build process.

    #### Cause

    The Airbridge SDK's `AndroidManifest.xml` includes rules to opt-out of backing up the Shared Preferences data. The purpose of this rule is to avoid retaining the same Airbridge settings during the reinstallation of the app so that new installs or reinstalls can be detected accurately.

    Merging Airbridge SDK backup rules with your app backup rules can cause conflicts.

    #### Solution

    Below are the opt-out rules defined in the Airbridge SDK.

    <CodeGroup>
      ```xml Backup on Android 12 or later lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
      <?xml version="1.0" encoding="utf-8"?>
      <data-extraction-rules>
          <cloud-backup>
              <exclude domain="sharedpref" path="airbridge-internal" />
              <exclude domain="sharedpref" path="airbridge-install" />
              <exclude domain="sharedpref" path="airbridge-user-info" />
              <exclude domain="sharedpref" path="airbridge-user-alias" />
              <exclude domain="sharedpref" path="airbridge-user-attributes" />
              <exclude domain="sharedpref" path="airbridge-device-alias" />
              <exclude domain="database" path="airbridge.db" />
          </cloud-backup>
          <device-transfer>
              <exclude domain="sharedpref" path="airbridge-internal" />
              <exclude domain="sharedpref" path="airbridge-install" />
              <exclude domain="sharedpref" path="airbridge-user-info" />
              <exclude domain="sharedpref" path="airbridge-user-alias" />
              <exclude domain="sharedpref" path="airbridge-user-attributes" />
              <exclude domain="sharedpref" path="airbridge-device-alias" />
              <exclude domain="database" path="airbridge.db" />
          </device-transfer>
      </data-extraction-rules>
      ```

      ```xml Backup on Android 11 and earlier lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
      <?xml version="1.0" encoding="utf-8"?>
      <full-backup-content>
          <exclude domain="sharedpref" path="airbridge-internal" />
          <exclude domain="sharedpref" path="airbridge-install" />
          <exclude domain="sharedpref" path="airbridge-user-info" />
          <exclude domain="sharedpref" path="airbridge-user-alias" />
          <exclude domain="sharedpref" path="airbridge-user-attributes" />
          <exclude domain="sharedpref" path="airbridge-device-alias" />
          <exclude domain="database" path="airbridge.db" />
      </full-backup-content>
      ```
    </CodeGroup>

    ##### Fix conflict with fullBackupContent="string"

    Adding `android:fullBackupContent="string"` to the `AndroidManifest.xml` may cause an error like the following.

    ```html Build Output lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    Manifest merger failed : Attribute application@fullBackupContent value=(string) from AndroidManifest.xml
    ```

    To fix this error,

    * add `xmlns:tools="http://schemas.android.com/tools"` in the `Platforms > Android > Extra Tags for <manifest> node` to the Unreal Editor Project Settings window.
    * add `tools:replace="android:fullBackupContent"` in the `Platforms > Android > Extra Tags for <application> node` to the Unreal Editor Project Settings window.

    ##### Fix conflict with dataExtractionRules="string resource"

    Adding `android:dataExtractionRules="string resource"` to the `AndroidManifest.xml` may cause an error like the following.

    ```html Build Output lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    Manifest merger failed : Attribute application@dataExtractionRules value=(string resource) from AndroidManifest.xml

    ```

    To fix this error,

    * add `xmlns:tools="http://schemas.android.com/tools"` to the `Platforms > Android > Extra Tags for <manifest> node` in the Unreal Editor Project Settings window.
    * add `tools:replace="android:dataExtractionRules"` to the `Platforms > Android > Extra Tags for <application> node` in the Unreal Editor Project Settings window.

    ##### Fix conflict with allowBackup="false"

    If you add `android:allowBackup="false"` in the `AndroidManifest.xml`, you might get the following error:

    ```html Build Output lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    Manifest merger failed : Attribute application@allowBackup value=(false) from AndroidManifest.xml:32:9-36
    	is also present at [:airbridge] AndroidManifest.xml:27:9-35 value=(true).
    	Suggestion: add 'tools:replace="android:allowBackup"' to <application> element at AndroidManifest.xml:30:5-250:19 to override.
    ```

    To fix this error,

    * add `xmlns:tools="http://schemas.android.com/tools"` to the `Platforms > Android > Extra Tags for <manifest> node` in the Unreal Editor Project Settings window.
    * add `tools:replace="android:allowBackup"` to the `Platforms > Android > Extra Tags for <application> node` in the Unreal Editor Project Settings window.

    ##### If compileSdkVersion is l than 31

    The `android:dataExtractionRules` has been added in API Level 31. Therefore, if the compileSdkVersion is lower than 31,  an error like the following may occur.

    ```html Build Output lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    AndroidManifest.xml: AAPT: error: attribute android:dataExtractionRules not found.
    ```

    To fix this error,

    * add `xmlns:tools="http://schemas.android.com/tools"` to the `Platforms > Android > Extra Tags for <manifest> node` in the Unreal Editor Project Settings window.
    * add `tools:remove="android:dataExtractionRules"` to the `Platforms > Android > Extra Tags for <application> node` in the Unreal Editor Project Settings window.

    For more guidance, refer to the articles below.

    * [Android Developers Guide](https://developer.android.com/identity/data/autobackup)
    * [Airbridge Developer Guide](https://airbridge.readme.io/page/auto-backup-%EC%A4%91%EB%B3%B5-%EB%AC%B8%EC%A0%9C-%ED%95%B4%EA%B2%B0-%EA%B0%80%EC%9D%B4%EB%93%9C)
  </Accordion>

  <Accordion title="Resolve Airbridge SDK backup rules merge conflict issue">
    #### Issue

    If an Airbridge SDK backup rule and a backup rule for a different third-party SDK (e.g., AppsFlyer SDK) overlap, you will see the build error below.

    ```html lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    Attribute application@fullBackupContent value=(@xml/appsflyer_backup_rules) from [com.appsflyer:af-android-sdk:6.6.1] AndroidManifest.xml:14:18-73
    is also present at [io.airbridge:sdk-android:2.14.0] AndroidManifest.xml:27:18-78 value=(@xml/airbridge_auto_backup_rules).
    Suggestion: add 'tools:replace="android:fullBackupContent"' to <application> element at AndroidManifest.xml:7:5-13:19 to override.
    ```

    #### Cause

    Overlapping of the Airbridge SDK backup rules and third-party SDK backup rules can cause build errors.

    #### Solution

    ##### `backup_rules.xml` setup

    1. Create a file (e.g., `custom_backup_rules.xml`) within the module directory.
    2. Add the data backup rules defined by the Airbridge SDK as follows.

       ```xml lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
       <?xml version="1.0" encoding="utf-8"?>
       <full-backup-content>
           <!-- Airbridge Backup Rules -->
           <exclude domain="sharedpref" path="airbridge-internal" />
           <exclude domain="sharedpref" path="airbridge-install" />
           <exclude domain="sharedpref" path="airbridge-user-info" />
           <exclude domain="sharedpref" path="airbridge-user-alias" />
           <exclude domain="sharedpref" path="airbridge-user-attributes" />
           <exclude domain="sharedpref" path="airbridge-device-alias" />
           <exclude domain="database" path="airbridge.db" />

           <!-- Appsflyer Backup Rules -->
           <exclude domain="sharedpref" path="appsflyer-data"/>
        
       	<!-- Your Custom Backup Rules -->
       </full-backup-content>
       ```
    3. Using the Unreal Plugin Language (UPL), copy the file into your `res/xml` folder as follows.

       ```xml lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
       <?xml version="1.0" encoding="utf-8"?>
       <root xmlns:android="http://schemas.android.com/apk/res/android">
           ...
           <resourceCopies>
               <copyFile src="{YOUR_XML_BACKUP_RULES_PATH}" dst="$S(BuildDir)/res/xml/custom_backup_rules.xml" />
               ...
           </resourceCopies>
           ...
       </root>
       ```

    ##### `data_extraction_rules.xml` setup

    1. Create a file (e.g., `custom_data_extraction_rules.xml`) within the module directory.
    2. Add the data backup rules defined by the Airbridge SDK as follows.

       ```xml lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
       <?xml version="1.0" encoding="utf-8"?>
       <data-extraction-rules>
           <cloud-backup>
               <!-- Airbridge Backup Rules -->
               <exclude domain="sharedpref" path="airbridge-internal" />
               <exclude domain="sharedpref" path="airbridge-install" />
               <exclude domain="sharedpref" path="airbridge-user-info" />
               <exclude domain="sharedpref" path="airbridge-user-alias" />
               <exclude domain="sharedpref" path="airbridge-user-attributes" />
               <exclude domain="sharedpref" path="airbridge-device-alias" />
               <exclude domain="database" path="airbridge.db" />

               <!-- Appsflyer Backup Rules -->
               <exclude domain="sharedpref" path="appsflyer-data"/>

       	    <!-- Your Custom Backup Rules -->
           </cloud-backup>
           <device-transfer>
               <!-- Airbridge Backup Rules -->
               <exclude domain="sharedpref" path="airbridge-internal" />
               <exclude domain="sharedpref" path="airbridge-install" />
               <exclude domain="sharedpref" path="airbridge-user-info" />
               <exclude domain="sharedpref" path="airbridge-user-alias" />
               <exclude domain="sharedpref" path="airbridge-user-attributes" />
               <exclude domain="sharedpref" path="airbridge-device-alias" />
               <exclude domain="database" path="airbridge.db" />

               <!-- Appsflyer Backup Rules -->
               <exclude domain="sharedpref" path="appsflyer-data"/>

       	    <!-- Your Custom Backup Rules -->
           </device-transfer>
       </data-extraction-rules>
       ```
    3. Using the Unreal Plugin Language (UPL), copy the file into your `res/xml` folder as follows.

       ```xml lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
       <?xml version="1.0" encoding="utf-8"?>
       <root xmlns:android="http://schemas.android.com/apk/res/android">
           ...
           <resourceCopies>
               <copyFile src="{YOUR_XML_BACKUP_RULES_PATH}" dst="$S(BuildDir)/res/xml/custom_data_extraction_rule.xml" />
               ...
           </resourceCopies>
           ...
       </root>
       ```

    ##### `AndroidManifest.xml` setup

    In the Unreal Editor Project Settings window, add the following element to the `Platforms - Android` > `Advanced APK Packaging` > `Extra Tags for <manifest> node`.

    * `xmlns:tools="http://schemas.android.com/tools"`

    In the Unreal Editor Project Settings window, add the following elements to the `Platforms - Android` > `Advanced APK Packaging` > `Extra Tags for <application> node`.

    * `android:allowBackup="true"`
    * `android:fullBackupContent="@xml/custom_backup_rules"`
    * `android:dataExtractionRules="@xml/custom_data_extraction_rules"`
    * `tools:replace="android:fullBackupContent, android:dataExtractionRules"`

    For more guidance, refer to the articles below.

    * [Unreal Plugin Language](https://dev.epicgames.com/documentation/en-us/unreal-engine/using-the-unreal-plugin-language-for-mobile-projects-in-unreal-engine?application_version=5.0)
    * [Android Manifest Control](https://dev.epicgames.com/documentation/en-us/unreal-engine/how-to-use-android-manifest-control-in-unreal-engine-projects)
  </Accordion>

  <Accordion title="GAID is collected as 00000000-0000-0000-0000-000000000000">
    #### Issue

    GAID is being collected as 00000000-0000-0000-0000-000000000000 even though LAT (Limited Ad Tracking) is deactivated.

    #### Cause

    The AD\_ID permission has been excluded due to other third-party libraries.

    #### Solution

    Add AD\_ID permission.

    ```xml lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
    <manifest ...>
      ...
      <uses-permission android:name="com.google.android.gms.permission.AD_ID" />
      ...
    </manifest>
    ```
  </Accordion>

  <Accordion title="Warnings or rejections related to 16KB page size occur when uploading to Google Play">
    ### **Issue**

    When uploading your app to Google Play Console, you may receive the following warning or rejection messages:

    * "Your app doesn't support 16 KB page size"
    * "16 KB page size compatibility required"
    * App upload is rejected or displayed in a warning state

    This is due to Google Play policy requirements that apps targeting Android 15 (API level 35) or higher must support 16KB page size.

    ### Cause

    To support 16 KB page sizes, the entire app (APK/AAB) must be packaged with 16 KB zipalign to pass Google Play policy.

    If the APK/AAB is not built with 16 KB zipalign:

    * You will receive warning or rejection messages when uploading to Google Play Console
    * Uploads will be completely blocked after November 1, 2025
    * The app may not work properly on 16KB page size devices in the future

    **Known Issue in the Airbridge SDK: PT\_GNU\_RELRO Alignment**

    The Airbridge SDK has supported 16 KB page sizes since v4.6. However, in versions built with NDK r21, the LOAD segments of the native libraries (`.so`) are aligned to the 16 KB boundary, but the `PT_GNU_RELRO` segment is not.

    * **App behavior is not affected.** The app runs normally on 16 KB page size devices.
    * However, Google Play Console may display a 16 KB page size warning when you upload your app.
    * Alignment check tools such as Android Studio lint, APK Analyzer, and `check_elf_alignment.sh` may also report this as a warning.

    This issue was resolved by upgrading the SDK build toolchain to NDK r27, and 16 KB page size support has been verified after the fix. Refer to the table below for the minimum version with 16 KB support and the recommended version for each platform.

    | Platform      | Minimum Version with 16 KB Support | Recommended Version (PT\_GNU\_RELRO issue fixed) |
    | ------------- | ---------------------------------- | ------------------------------------------------ |
    | Android       | v4.6                               | v4.9.4                                           |
    | React Native  | v4.6                               | v4.9.0                                           |
    | Cordova Ionic | v4.4.1                             | x (support planned)                              |
    | Flutter       | v4.6                               | v4.9.0                                           |
    | Expo          | v4.6                               | v4.9.0                                           |
    | Unity         | v4.6                               | v4.9.2                                           |
    | Unreal        | v4.6                               | v4.9.0                                           |

    ### **Solution**

    **Step 1: Check Airbridge SDK Version**

    Compare the Airbridge SDK version you are using against the table above.

    * **If you are using a version lower than the** **`Minimum Version with 16 KB Support`:**

      16 KB page sizes are not supported. Be sure to update.
    * **If you are using a version at or above the** **`Minimum Version with 16 KB Support`** **but below the** **`Recommended Version`:**

      The `PT_GNU_RELRO` alignment issue described above may cause Google Play Console to keep showing the warning. App behavior is not affected, but to resolve the warning, update to the `Recommended Version` or later.

    **Step 2: Check and Configure Android Gradle Plugin (AGP) Version**

    Check your project's current AGP version.

    If using AGP 8.5.1 or higher:

    * 16KB zipalign is automatically applied without any additional configuration.
    * Proceed directly to Step 3.

    If using AGP 8.5.0 or lower:

    * Option A: Upgrade AGP to 8.5.1 or higher
    * Option B: Keep current AGP version + Add configuration

      ```groovy lines theme={"theme":{"light":"github-dark-dimmed","dark":"github-dark-dimmed"}}
      android {
          ...
          packagingOptions {
              jniLibs {
                  useLegacyPackaging true
              }
          }
      }
      ```

    **Step 3: Rebuild and Verify the App**

    After changing the configuration, perform a clean build of your app.

    **Step 4: Verify 16KB zipalign Application**

    Verify that the built APK/AAB is properly 16KB zipaligned.
  </Accordion>
</AccordionGroup>

<link rel="alternate" hrefLang="en" href="https://help.airbridge.io/en/developers/troubleshooting-unreal-sdk-v4" />

<link rel="alternate" hrefLang="ko" href="https://help.airbridge.io/ko/developers/troubleshooting-unreal-sdk-v4" />