You should have a look into your log, there should be some error messages.
Posts by Roman
The Aternos forums are now deprecated
Learn more about this change here.
For help regarding Aternos, we recommend you to visit our support center.
-
-

You have to choose a different version in the Technic Launcher. -
-
-
Hello Will,
i had a deeper look into your server and multiple bugs came together here. One of them is surely in context with your usage of the knock back 1000 stick.

But it seems that you are not the first one who experienced this error.
These bugs are remnants of 1.11.1, which was a very buggy version, and are still persistent in older 1.11.2 versions of spigot/bukkit. I've updated spigot/bukkit on Aternos to the latest available version and now you are able to start your server again. -
Hast du für uns auch den Link zur Seite auf dem die Mod beschrieben wird?
-
Please add a link to your request
-

We've added it to our ideas list. Maybe it will be added in future.
-

We've added it to our ideas list. Maybe it will be added in future.
-

Denied
-

We've added it to our ideas list. Maybe it will be added in future.
-

We've added it to our ideas list. Maybe it will be added in future.
-

No serverversion available.
-

We've added it to our ideas list. Maybe it will be added in future.
-

We've added it to our ideas list. Maybe it will be added in future.
-

We've added it to our ideas list. Maybe it will be added in future.
-
Hups, mein Fehler

Der Befehl sollte lauten /pex user {username} add "*"glaube ich

-

Updated
-
could you give us a screenshot of the error message you see in minecraft?
-
Very curious...
It looks like our network protection is blocking your request.
Could you DM me your IP-Address?