My server stops randomly

Check the server console for more information on why your server stops. Make sure you only set as many slots as you really need, otherwise your server stops after some time.

Check the console while your server is online.

What is your Aternos username?

I just checked your server and it seems like a plugin or command block throws a lot of errors causing the crashes.

No sorry, I can't tell you exactly. Check the logs again, maybe you will find out.

Same problem but i dont have plugins. The Console doesn't give me any information. It just says: flipthebeer joined the server and then it stops.