What happened?

So a friend of mine set up a server where this mod is used (Its the Better MC Fabric BMC2 modpack) and for some reason every time i place ANY slab it crashes me out of the server and i have no idea why

Dawn API version

idk

Fabric API version

No response

Relevant log output

No response

Could not reproduce, this bug is not the latest version of Promenade, especially with Dawn API version "idk"