Neither using Proton 5.0-7 nor using Proton-5.8-GE-1-MF I was able to start the game. When I click on the "play" button, it takes a few seconds and then just stop working and the "play" button comes to be "green" again.

I'm not sure why it's happening at all, but I saw I was not the only one on the community with a similar problem.

Note: I have a dual boot on my desktop with Windows 10 and for no reason the game doesn't work anymore there too. A few months ago, the game was running very well on Win 10, but now it opens a black screen and waits for me to close that, apparently for no reason. Once the problem occurs on both SO, maybe that's a personal problem with me, idk.