We installed a slabs mod that interacts with many of the other blocks from other mods, and everything was working fine as normal. I placed a fossils:Volcanic_slab in the server, and it crashed my game. The server didn't make a crash report, so I only have my local crash report to go off of. I attempted to remove the block in mcedit from the world and my player's inventory but this did not fix anything, the game crashes immediately upon joining the server.
This is the crash log: https://pastebin.com/KbrRDjuX
Thanks for any help