Server kick with visualoverhaul when a player joins

[Xplodin]

https://gist.github.com/Xplodin/1379a858f9b78401321b44fcbf0c9c90

[some-du6e]

screenshot:

[Motschen]

The log you provided does not contain any information on why this problem would occur.
I need the crash log to look into this further.
Also, could you please tell me if VisualOverhaul is installed only on the client or only on the server, and generally provide some more information on how to replicate this?

[Xplodin]

I believe this was replicated but didnt yield a crash log oddly.
It only kicked the user from the server.
Its hard to tell if I could replicate it again. As I havent used the mod in my modpack since.
However I think it was when the mod was not on the server. But am unsure to be honest.
I might have tried both but its been some time