I wrote "restart". There is restart button on the server page.
it worked!!!! thanks for the help 
Posts by EIWKING
The Aternos forums are now deprecated
Learn more about this change here.
For help regarding Aternos, we recommend you to visit our support center.
-
-
Remove the mods one by one from your server.
Every time you remove a mod from your server, you need to restart it, then check if the problem still occurs.
If the problem doesn't occur anymore, know that it was probably due to the modification you last removed.
when you say reset you mean stop the server and start it again?
-