Crash log:
crash-2023-10-05_23.18.02-client.txt

A Little Bit of looking through the code reveals that this only happens when MCEF is being run from a JAR, not a development environment.

Looking a little bit closer within the code and a little bit of decompiling the JAR revealed that the java-cef-commit property within MANIFEST.MF for whatever reason isn't being included. (See image below)

Reference:

I know i could implement a temp workaround. (id probably add a config option or a -D Flag or something)

Fixed in the release