I am getting this error while building my app
ERROR:C:\Users\soama\Downloads\Compressed\VeeChat-master\VeeChat-master\app\build\intermediates\packaged_manifests\debug\AndroidManifest.xml:27: AAPT: error: '' is incompatible with attribute fullBackupContent (attr) reference|boolean.
here is the file with the error
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dev.spak.spakchatter"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="23"
android:targetSdkVersion="31" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Although the *SdkVersion is captured in gradle build files, this is required for non gradle builds -->
<!-- <uses-sdk android:minSdkVersion="14" /> -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" /> <!-- Required by older versions of Google Play services to create IID tokens -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<permission
android:name="com.dev.spak.spakchatter.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.dev.spak.spakchatter.permission.C2D_MESSAGE" />
<application
android:name="com.dev.spak.spakchatter.VeeChat"
android:allowBackup="true"
android:appComponentFactory="androidx.core.app.CoreComponentFactory"
android:debuggable="true"
android:exported="true"
android:extractNativeLibs="false"
android:fullBackupContent=""
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<service
android:name="com.dev.spak.spakchatter.FirebaseMessagingService"
android:exported="false" >
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<activity
android:name="com.dev.spak.spakchatter.MainActivity"
android:exported="true" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.dev.spak.spakchatter.StartActivity" />
<activity
android:name="com.dev.spak.spakchatter.RegisterActivity"
android:parentActivityName="com.dev.spak.spakchatter.StartActivity" />
<activity android:name="com.dev.spak.spakchatter.LoginActivity" />
<activity android:name="com.dev.spak.spakchatter.SettingsActivity" />
<activity
android:name="com.dev.spak.spakchatter.StatusActivity"
android:parentActivityName="com.dev.spak.spakchatter.SettingsActivity" />
<activity
android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
android:theme="@style/Base.Theme.AppCompat" />
<activity
android:name="com.dev.spak.spakchatter.UsersActivity"
android:parentActivityName="com.dev.spak.spakchatter.MainActivity" />
<activity
android:name="com.dev.spak.spakchatter.ProfileActivity"
android:exported="true" >
<intent-filter>
<action android:name="com.example.quangviet.veechat_TARGET_NOTIFICATION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="com.dev.spak.spakchatter.ChatActivity"
android:parentActivityName="com.dev.spak.spakchatter.MainActivity" />
<activity
android:name="com.google.firebase.auth.internal.FederatedSignInActivity"
android:excludeFromRecents="true"
android:exported="true"
android:launchMode="singleInstance"
android:permission="com.google.firebase.auth.api.gms.permission.LAUNCH_FEDERATED_SIGN_IN"
android:theme="@android:style/Theme.Translucent.NoTitleBar" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<!--
FirebaseMessagingService performs security checks at runtime,
no need for explicit permissions despite exported="true"
-->
<service
android:name="com.google.firebase.messaging.FirebaseMessagingService"
android:exported="true" >
<intent-filter android:priority="-500" >
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<service
android:name="com.google.firebase.components.ComponentDiscoveryService"
android:directBootAware="true"
android:exported="false" >
<meta-data
android:name="com.google.firebase.components:com.google.firebase.firestore.FirestoreRegistrar"
android:value="com.google.firebase.components.ComponentRegistrar" />
</service>
<activity
android:name="com.google.android.gms.common.api.GoogleApiActivity"
android:exported="false"
android:theme="@android:style/Theme.Translucent.NoTitleBar" />
<receiver
android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver"
android:exported="true"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="com.dev.spak.spakchatter" />
</intent-filter>
</receiver>
<!--
FirebaseInstanceIdService performs security checks at runtime,
no need for explicit permissions despite exported="true"
-->
<service
android:name="com.google.firebase.iid.FirebaseInstanceIdService"
android:exported="true" >
<intent-filter android:priority="-500" >
<action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
</intent-filter>
</service>
<provider
android:name="com.google.firebase.provider.FirebaseInitProvider"
android:authorities="com.dev.spak.spakchatter.firebaseinitprovider"
android:directBootAware="true"
android:exported="false"
android:initOrder="100" />
</application>
</manifest>
