Manifest merger failed : Apps targeting Android 12 and higher are required to specify an explicit value for `android:exported`
<activity
android:name=".MainActivity"
android:exported="true" <-- add this
android:theme="@style/Theme.MyApplication.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>