Issue: 1.15.2-1.3.3 crashes dedicated server Forge 1.15.2 build 31.1.46

Notes:

crash report:
http://paste.ubuntu.com/p/cjt7VZ9rzK/

fml server latest:
http://paste.ubuntu.com/p/MPP7PdpsSP/

Thank you for letting me know! v1.3.4 is now out and should fix this bug.
https://www.curseforge.com/minecraft/mc-mods/worldblender/files

I'll close this issue now. Let me know if there any another problems!