it shows this error while executing this project

Error while executing: am start -n "com.example.triviality/com.example.triviality.QuizActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.triviality/.QuizActivity }
Error type 3
Error: Activity class {com.example.triviality/com.example.triviality.QuizActivity} does not exist.

Error while Launching activity