Adding Metallurgy 4: Reforged to a modpack with Unlimited Chiselworks

Crash Log: pastebin

maximum id range exceeded?

Reproduceable : Yes

Only crashes on load when both are enabled.

Yep, you have too many blocks. Before 1.13.x, the game cannot have more than 4096 blocks registered. Get fewer mods, disable some functionality, or use something like JustEnoughIDs as a workaround.