MultiMC Log:
https://paste.ee/p/dEJ0C

VanillaFix Log:
crash-2022-09-12_17.25.58-server.txt

Note: The game didn't crash, just VanillaFix stored the log as a crash report.

Fixed in BB 2.6 update. You can download it on the mchorse discord in the dev-builds by getting dev-build-tester role.