It seems to specifically happen when I have this config, no idea if the exact options I chose are what causes the crash, but here.
gammautils.json

It doesn't seem to crash on a fresh install (Even when I change the config) so I have no idea what's going on.
latest.log
No crash report was generated.

From the logs it looks like the crash is caused by TslatEntityStatus.
It's reacting to the gamma status effect change and tries to run server code while being on a client.
I have to look furter into their code to see exactly what they're trying to do.
For now I suggest not using the status effects of Gamma Utils while you also have TslatEntityStatus installed

Alrighty ty!