/Users/young/Desktop/sparta/projects/prac/venv/bin/python /Users/young/Desktop/sparta/projects/prac/app.py 

 * Serving Flask app 'app'

 * Debug mode: on

Address already in use

Port 5000 is in use by another program. Either identify and stop that program, or start the server with a different port.

On macOS, try disabling the 'AirPlay Receiver' service from System Preferences -> Sharing.

종료 코드 1(으)로 완료된 프로세스

라고 뜨면서 서버(http://localhost:5000/) 접속하면 액세스가 거부 되었다고 뜨는데

화면 미러링을 꺼야 하나요.. 모니터 연결해서 사용하고 있어요...ㅠㅠㅠㅠㅠ..