Prerequisites

• I am running the latest alpha version of MineColonies and Structurize for my Minecraft version.
• I checked the MineColonies/Structurize wiki and made sure my issue is not covered there.
• I made sure that this issue is not a duplicate of any existing issue.

Context

• Minecraft: v1.16.3
• Minecolonies: v0.13.386-Alpha
• Structurize: v0.13.92-Alpha
• Improved Mobs: v1.7.3

Expected behavior

• No crashes

Actual behavior

• The game crashed during world gen.

Steps to reproduce the issue

1. Install Improved Mobs
2. Generate a new world
3. Crash

Logs

• crashlog: https://gist.github.com/WenXin20/12a0924d53a89fa10c9deb8865ec1ff6

Notes

• I reported this to Improved Mobs first, but was redirected here.
• Flemmli97/ImprovedMobs#47

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