I get this crashlog when I use OptiFabric together with this branch of the WorldEditCUI compiled locally with Gradle.

I'm not sure if WorldEditCUI or OptiFabric is at fault, but they worked fine together on 1.17 with OptiFabric 1.11.9. Note that the 1.17 build of WorldEditCUI works fine on 1.17.1 without OptiFabric installed.

I'll look into this on the WECUI side at some point -- the current state of the 1.17 branch is pretty in flux, so it's unlikely to be useful to add any compatibility shims into optifabric just yet.

Be aware we have some of our own integration with Optifine to activate the appropriate shaders for our rendering (as of 1.16) -- see https://github.com/mikroskeem/WorldEditCUI/blob/dea9a2e4c3c43a247a7200ab3950444124adbd01/src/main/java/eu/mikroskeem/worldeditcui/OptifineHooks.java#L80

if anything comes up in the future with WECUI, feel free to give me a shout at any time :)

I think you got your crash report link slightly wrong, the list of pastes it links to all look unrelated

Not sure where the hell my browser got that link from when I copied and pasted. I've corrected the link now, sorry about that.