Is the server old? If it is, you might not be able to play on it. You need to create a new server if you want to play. Go to https://aternos.org/options/ and see if anything is wrong, though.
Posts by Frequenced
The Aternos forums are now deprecated
Learn more about this change here.
For help regarding Aternos, we recommend you to visit our support center.
-
-
It might be the IP, their internet connection, or the server is very old. Most often the error messages that you gave happen because the server is either outdated, or maybe you changed something in the server properties.