Am facing this issue and am at beginner lever. Please look the code and help me.
Check the image for reference https://ibb.co/HnZtNPz
I had removed one file from the Onesignal notifications, https://ibb.co/PDwC1BZ . I can give you my pc remote access if you want to check the code.
I even tried adding android:exported:true/false in evey activity but it didn't helped me out
Here is my AndroidMainfest.xml https://pastebin.com/UiCbLnuj
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.divinetechs.quiz">
<uses-feature
android:name="android.hardware.camera2.full"
android:required="false" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-feature
android:name="android.hardware.camera.flash"
android:required="false" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="29" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="com.android.vending.BILLING" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-feature
android:name="android.hardware.wifi"
android:required="true" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:name=".Util.MyApp"
android:allowBackup="true"
android:hardwareAccelerated="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:requestLegacyExternalStorage="true"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"
android:usesCleartextTraffic="true"
tools:replace="android:allowBackup,android:label">
<uses-library
android:name="org.apache.http.legacy"
android:required="false" />
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="@string/admob_main_id" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" /> <!-- TODO: Replace with your real AdMob app ID -->
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="@string/facebook_app_id" />
<provider
android:name="com.facebook.FacebookContentProvider"
android:authorities="com.facebook.FacebookContentProvider${applicationId}"
android:exported="true" />
<activity
android:name="com.facebook.FacebookActivity"
android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:label="@string/app_name" />
<activity
android:name="com.facebook.CustomTabActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="@string/fb_login_protocol_scheme" />
</intent-filter>
</activity>
<activity
android:name=".Activity.SplashScreen"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait"
android:theme="@style/WelcomeTheme"
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=".Activity.WelcomeActivity"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:label="@string/welcome_slides"
android:screenOrientation="portrait"
android:theme="@style/WelcomeTheme" />
<activity
android:name=".Activity.MainActivity"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Login"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden|adjustPan" />
<activity
android:name=".Activity.Registration"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden|adjustPan" />
<activity
android:name=".OTPLogin.SendOTP"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden|adjustPan" />
<activity
android:name=".OTPLogin.OTPVerification"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden|adjustPan" />
<activity
android:name=".Activity.PermissionActivity"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Instruction"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Notifications"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.AboutUs"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.DailyLoginChallenge"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.SpinAndWin"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.QuestionAnswer"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.AddQuestion"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Category"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.LevelResult"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.LevelSelection"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.PractiseQuiz.PractiseByLevel"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.PractiseQuiz.PractiseQueAns"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.PractiseQuiz.PractiseLeaderBoard"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.LeaderBoardActivity"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Profile"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.ProfileUpdate"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
android:hardwareAccelerated="true"
android:screenOrientation="portrait"
android:theme="@style/Base.Theme.AppCompat"
android:windowSoftInputMode="adjustPan" />
<activity
android:name=".Activity.WalletActivity"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.WithdrawHistory"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.WithdrawRequest"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.ReferAndEarn"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Settings"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Statistics"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Contest.Contests"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Contest.ContestUpcoming"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Contest.ContestQueAns"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Contest.ContestQueReview"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.Contest.ContestLeaderBoard"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.UserLeaderBoard"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<activity
android:name=".Activity.ForgotActivity"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden|adjustPan" />
<activity
android:name=".Activity.Subscriptions"
android:configChanges="orientation|screenSize"
android:hardwareAccelerated="true"
android:screenOrientation="portrait" />
<!--
<service
android:name=".PushNotification.NotificationExtenderExample"
android:permission="android.permission.BIND_JOB_SERVICE"
android:exported="false">
<intent-filter>
<action android:name="com.onesignal.NotificationExtender" />
</intent-filter>
</service>
<service android:name=".PushNotification.MyFirebaseMessagingService"
android:exported="false">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<service android:name=".PushNotification.MyFirebaseInstanceIDService"
android:exported="false">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
</intent-filter>
</service> Firebase Notifications -->
<meta-data
android:name="com.google.firebase.messaging.default_notification_channel_id"
android:value="Description" />
<!-- ./Firebase Notifications -->
<!--Change package name in file_paths.xml file in res ==> xml ==> file_paths.xml-->
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
</application>
<!--Add below queries for Android 11-->
<queries>
<package android:name="com.facebook.katana" />
</queries>
<queries>
<intent>
<action android:name="android.media.action.IMAGE_CAPTURE" />
</intent>
</queries>
</manifest>
Thank You