Crashes when trying to create a world on a server

[R3tr0PAG]

The Title says it all, no matter the mods which i tested without it freezes and then crashes the server.

---- Crash Log -----
https://pastebin.com/aQwbd6ML

And it can't really be a mod issue beacuse it works fine on singleplayer with the exact same mods, actually even more mods on singleplayer then server

[suerion]

Hey, had also the problem on an server to create an World

https://mclo.gs/WN2MErT