I'm running Fabric 0.12.12 and the last update of Wandering Collector for 1.18 (version 1.1.0) is causing a crash.
here's my latest.log

That's what happens if one doesn't do proper testing on all Minecraft versions :P

Thanks for reporting, this should:tm: be fixed now in version 1.1.1 (commit 6fe34d4).