I have found an incompatibility with Charm. I just tested the two mods together on Minecraft 1.18.2 which resulted in a crash. Arcanus version 1.28, Charm version 4.0.0. I have also reported this to the Charm dev.
latest.log

Uhhh from the looks of things, Charm has a mixin that doesn't work on 1.18.2? I don't think this is Arcanus' fault, but it might be. Does Charm load on 1.18.2 on its own?

Yes charm works when Arcanus is disabled.

I inject into ClientPlayNetworkHandler#onEntitySpawn, while they inject into ClientPlayPacketListener#onEntitySpawn so I'm not entirely sure why their mixin is failing to inject.

So just loaded it myself, and it works fine? Not sure why it's crashing for you.

Strange, the issue still persists for me using the latest versions of fabric api, cloth config, charm, and arcanus with java 17. I wonder what is different between our environments.

Huh. So it works in my dev environment, but not in a built environment. Yay weird bugs.