After using the Dragon egg in the Temple to restore the End and the Dragon the entire server crashes. Afterwards if anyone tries to enter the End again, the server crashes again.
This is the crash log the server gave us:
https://gist.github.com/Dream-Master/d4d4da4091350a578839ab1c76ddcd08

If you need any extra data please ask

Modpack we using :
https://github.com/GTNewHorizons/NewHorizons

HEE Version 1.86
Thermos Version 56

Cauldron is not supported, it changes code HEE requires to function properly. This specifically is a Cauldron error.