Illegal State Exception with Progressive Bosses mod

[TheWhit3F0x]

Affected Product(s)

SpongeForge

Version

spongeforge-1.16.5-36.2.5-8.1.0-RC1153

Operating System

Linux

Java Version

openjdk 1.8.0_312

Plugins/Mods

- InsaneLib-1.4.2
- ProgressiveBosses-3.4.3

Describe the bug

Basically, it seems that Sponge doesn't like the idea of Progressive Bosses changing some of the dragon's properties. As a result, it crashes when trying to start the server. That's the most I could work out from the issue.

Also, the forge version is: forge-1.16.5-36.2.35

How to reproduce:

• Put Sponge, InsaneLib and Progressive Bosses inside the mod's folder.

• Run the server

Link to logs

https://paste.gg/p/anonymous/dbf5aacfcbc74c24b7bdcdb1e0c63ffc