I don’t know if it is somehow my fault but even in singleplayer (localserver) and dedicated server using Speiger Pregenerator will crash at some random point, seems like it is pointing to GregTech but could be pregenerator itself or something else entirely. Also not sure if it is coincidence but sta…

https://minecraft.curseforge.com/projects/careful-cast-corrector-ccc so that can be marked as solved now.