crash report: https://pastebin.com/VR2UE7sf

it's a clash with pure suffering mod, as normally breezes don't have spawn placemnts, i can try asking neo how this kind of clash can be fixed but it's likely that both mods will need to do something

thank you, I hope this error can be fixed

fixed in version 1.21.1-0.7.3.0

It should be fixed permanently on my side but the other mod will still likely clash with other mods doing their exact thing. Mobs that aren't "yours" shouldn't use that register placement but MobSpawnEvent.SpawnPlacementCheck