Running the mod with Wilder Wild causes a crash on launch

Mod in question: https://modrinth.com/mod/wilder-wild

Crash Report: https://paste.debian.net/plainh/cad4182d

Ty for registering it on the hub. Initial checks indicate it's a Heisen-Bug, getResourceManager() returns null is what I get. Either it gets reloaded in the WW frozen lib somehow, or the Pen mod provokes it itself somehow. After updating Loom I don't get the crash anymore - which is worse, because the problem is assumingly not solved by that.

The fix attempt is pushed to curse and modrinth, v1.21-1.11.35, here we need confirmation if that really resolved the issue on the target machine.