Whatever the reason is, the fact that this issue cannot be reproduced when running the Windows version of Steam with any non-Proton wine version gives me hope that the fix should be simple, once the root cause has been i...
I can confirm seeing this. The server itself is working OK, I could connect to it from a Windows installation. The reason for this failure to connect through Proton I think it has more to do with recent changes in the ga...
I decided to test additional versions of Wine with the Windows version of Steam via Lutris. Here are the results: * Proton (ValveSoftware/wine) 4.11-3, 4.2-9, 3.16-9, 3.7-8 - "Could not connect to Steam network. Either t...