Modpack: Modern Skyblock 3
AS version: 1.10.11
GameStages version: 2.0.112
Forge: 14.23.5.2808

Crash log: https://gist.github.com/iarspider/10e64ff244fa44e45d0d239f834cfb90

I:levelCap=30
in my config file

a6278038-fe4e-4257-bdfe-fe50dbd892cf.astral.txt

And in the server config file?

where is it?

On the server

I'm playing in singleplayer (Sorry for being stupid)

That's an interesting one I've not seen before. Has it repeated?

Already twice, both on first login to a server. Subsequent logons are fine (until server restart).

Maybe this happens because I've spend 1 skill point while still on 1.9.x version, and then updated to 1.10.11...

Would have overwritten, wouldn't trigger this.

Hello, I also get a crash on MSB3, (don't know if it's this one, but log looks kind of similar) there is something with astral sorcery in my log.
It crashes when I enter my world. I tried loading a backup and that helped... but, now the backup version also crashes

https://pastebin.com/ng3XSYmB

It also didn't occur until i got further in Astral Sorcery

Can you verify the level cap setting in client config and server config, and also upload your player.astral file?

Server I:levelCap=30
Client I:levelCap=30

$(uuid).astral file (inside zip):

57cc09c4-0440-4eef-9419-8aa4425cfe12.zip