Minecraft Version

1.18.2

Immersive Engineering Version

1.18.2-8.4.0-161

How did it happen?

Took a blueprint and wanted to put it in a Workbench.
Game freezes, showing "Saving world" and then crashes. Occured in multiplayer but I have the same in singleplayer.

Crash Log

https://pastebin.com/k7VYAH2Y

I have already figured it out myself. Optifine was the problem...