Hey ! Very nice mod I play it in solo, but when I try to put it on my server he crash, here is the crash.log
CrashLog

Valable on Neoforge 1.21.1 ModLoader version .206

If you need more info im here

i also experience this issue

same here :(

I just tried the update and it seems to be resolved.
The server launches with the mod installed, and once connected, everything works correctly.
Can you also confirm that the problem is resolved for you too @pixel-nicole and @ThePuppeteerVT ?

Issue for neo-1.21.1 was resolved in version 0e5c899
Please reopen if issue persists!