Forge: Latest
Modpack: My Own
Mod Version: DoubleSlabs-1.12-0.11.0.jar
Using: https://magmafoundation.org
Magma Version: Magma version 12a54a3 and i tried the v3a65e28 of magma

but the mod crashes on either 1

Just disabled doubleslabs and my server just launched and started just fine.

Magma V12
https://pastebin.com/7iHBZ0rG

Magma V3
https://pastebin.com/2FQMmb0n

i have the same problem

Same.

same with mohist

Hi there! Apologies for the delay, this is now fixed in the latest version. Thank you for your patience :)