Minecraft Version

1.21.1

Immersive Engineering Version

12.3.1-189

How did it happen?

Not a crash but this doesn't fit in the bug category

When firing the railgun I'm disconnected from the server with "internal server error"
playing on ATM10 but I don't think this is another mod issue
haven't tested in singleplayer

link is for my debug.log file

Crash Log

https://mclo.gs/2Oktts8

nothing happened in singleplayer and its not happening on the server anymore. closing for now, will reopen if it happens again

Instead of your debug log, I'd rather have latest.log, because SilentGear makes the debug log basically unreadable!

Also I need the server log file from the moment of you getting disconnected.

i don't have access to the server log and i don't have the original latest.log file but i can test in singleplayer