Failure message: Mowzie's Mobs (mowziesmobs) encountered an error during the complete event phase
java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 0

crash-2023-05-17_18.27.34-fml.txt
latest.log

This appears to be a bug in Mowzie's Mobs, not ModernFix. But I have added a workaround that should fix it. It will be included in the next release.

Thx，this situation can also occur with twilightforest and dungeons_gears.