Unfortunately it needs to wait till tomorrow.

Good news: It will be likely fixed in the next hour already.

Next hotfix it should work 100% correct.
We needed to delay the first loading screen tip a bit when a community translation is applied because it requires Steamworks to be initialized.
But this way it will only show correctly translated tips.
Cheers and thanks for pointing us to this problem.

This was an oversight by me.
This very special mutator is the only one not represented as a file, but the game tried to load it as such, which failed.
We will get this fixed in a little hotfix today.

Thanks for pointing us to this mistake! :)

Glad you got it sorted.
Have fun playing! :)