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.

@Sjouwer Should I report this in TslatEntityStatus' github too? Or is the issue in Gamma Utils?

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!

Issue has been posted on TslatEntityStatus' github, see link above this post

I'm really sorry, I have been extremely busy the past month
I'll take a look this weekend and if an issue needs to be created on TslatEntityStatus' github then I'll do that for you

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

Thanks had the same issue !