[Solved] Could not identify launch activity: Default Activity not found Error while Launching activity

        <activity android:name=".ui.home.HomeActivity"
            android:configChanges="mcc|mnc"
            android:screenOrientation="portrait"
            android:theme="@style/Theme.Preference.DayNight"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
<!--                <category android:name="android.intent.category.LAUNCHER" />-->
            </intent-filter>
        </activity>

The reason for this is that the < category > line was commented out in the entry activity. The default activity is not found,
Remove the comment and the problem is gone!