This also happened when he hosted a server.
What does that mean? Was the server hosted on Aternos or on his pc?
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This also happened when he hosted a server.
What does that mean? Was the server hosted on Aternos or on his pc?
Then it's probably a bug in the modpack.
What plugin are you talking about? Do you have a link to it?
Did you already check the console for errors?
I think this should match your problem: https://help.aternos.org/en/plugin-not-work
Wir stellen die Modpacks bei uns so zur Verfügung wie sie auf feed-the-beast.com zum download angeboten werden.
Meist fragen die Launcher beim installieren ob noch zusätzlich Mods installiert werden sollen, dies solltest du natürlich nicht machen.
Please check your DMs

No server version available
We only add a server version which is availabe at the official source

We can not add paid plugins

No server version available
Das ist eine komplett andere mod, die gibt es jedoch auch bei uns: https://aternos.org/software/v/mods/davincisvessels

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https://mclo.gs/ZBOPT9m#L124
This is the reason why your server stops.
Do you use something special when the server crashes? Using an item, entering a portal etc. ?
No, the aternos account of course.
Is he able to connect via the DynIP?

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Wenn du mir sagst, wo es die neue Version gibt?