The game crashes on approaching a pillager outpost with Savage and Ravage 5.0.2.
Possibly affected by Improved mobs 1.11.0 but not sure.

I already also opened an issue for Improved Mobs since initially I was thinking that it was a problem on their side, but after looking a bit more on the stack trace and existing issues for Savage and Ravage I'm not sure now tbh.
So, there's not much to add but maybe see the description there: Flemmli97/ImprovedMobs#206

Crashlog: https://gist.github.com/noncom/1d968db181f0250894a579026e1c84ce

It's a Bumblezone mixin crash.