Even when disabling all other Mods (besides Creative Core, of course), I can barely use anything that comes from the Mod. Placing a downsized Block? Game crashes. Recolouring one of those coloured Blocks? Crash. Trying to use the Chisel? You guessed it, the Game crashes again.

In Case this is Relevant, the last thing I see before the entire Process dies is the Message "Shutting internal Server..."

Which versions are you using? Can you send me the crash reports?

Gonna piggyback on this since I'm crashing sometimes when using the hammer.

https://pastebin.com/Vz46QcT9

@Syphenion thanks! This crash occurs when you destroy a structure and undo it. I will try to fix it, but it still does not explain all of the other issues.

Oh geez ... Turned out i didn't use the correct Version. 😅 This explains pretty much everything. Sorry for the inconvenience mate.