Atum 2 version: 2.1.6
Minecraft version: 1.15.2
Forge Version: 31.2.36

Crash Log: https://pastebin.com/XrLGhgAa

It appears when rebuilding the beacon in the overworld it may cause a crash

This could be a compatibility issue as it occurred on the Valhelsia 2 modpack

Please let me know if you would like me to test a bit more or if there is anything I can do to help resolve the issue.