to reproduce have one player start a server (Open to LAN or dedicated server) & attempt to brush an excavation block with a second player nearby.
(The player who crashes (the one not excavating) needs to have the excavating player loaded in as well).

`Description: Ticking entity

java.lang.ClassCastException: class net.minecraft.class_745 cannot be cast to class net.capsey.archeology.entity.BrushingPlayerEntity (net.minecraft.class_745 and net.capsey.archeology.entity.BrushingPlayerEntity are in unnamed module of loader`
crash-2022-10-03_13.14.16-client.txt

I released new version with the fix (v0.2.4), hope now it doesn't crash! Close the issue if it worked

Tested it yesterday when the update was released, looks like it's fixed now.
Thanks!