Hello everyone,
first of all a big thank you, for all the work in the background!

I'm trying to start the client from a Linux Mint machine.
The client starts, I can click on a server, it's downloading the dependencies.
After that I get a "Could not join - message": 

"The native game-start supervisor exited (code 25): The native session supervisor is not in its protected startup job"

I didn't find anything for the keywords in the wiki, so I hope someone has a suggestion.

The launcher says it's up to date.
I tried starting it with Steam and Lutris - the message shows up in both cases.

I'm not too much into handling Linux behind the GUI, if the message has something to do with my system, I don't see it by now.

Maybe someone has a suggestion what to do, to get it work?

Thanks in advance :-)