Delete AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools">

    <application

        android:allowBackup="true"

        android:dataExtractionRules="@xml/data_extraction_rules"

        android:fullBackupContent="@xml/backup_rules"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:supportsRtl="true"

        android:theme="@style/Theme.8bitInvader"

        tools:targetApi="31">

        <!--https://stackoverflow.com/questions/3723823/i-want-my-android-application-to-be-only-run-in-portrait-mode-->

        <!--Locks the orientation of main activity to only allow portrait mode-->

        <activity

            android:name=".GameActivity"

            android:theme="@style/Theme.AppCompat.NoActionBar"

            android:configChanges="orientation"

            android:screenOrientation="portrait"/>

        <activity

            android:name=".MainActivity"

            android:exported="true"

            android:configChanges="orientation"

            android:screenOrientation="portrait">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity

            android:name=".PopUpWindow"

            android:configChanges="orientation"

            android:screenOrientation="portrait">

        </activity>

    </application>

</manifest>

 No newline at end of file