GUIs crash the game because of "No oshi.architecture.properties file found"

Hi,

I was testing out a GUI (that worked perfectly before btw) but when I opened it, it crashed the game.

I did some research and updated my graphic drivers and allowed Mcreator and Java in my firewall settings but it does not work either.

Can someone help me? Thx!

Ben

[16:37:05] [Render thread/WARN] [minecraft/ClientPacketListener]: Received passengers for unknown entity
[16:37:10] [Render thread/DEBUG] [os.ut.FileUtil/]: No oshi.architecture.properties file found from ClassLoader cpw.mods.modlauncher.TransformingClassLoader@5377414a