Are you running in proton, I got the same problem.
The native version wont open for me though.

Does the server list of the Steam client work at least? Just curious.

yea, just empty

I've been told that using Google's public DNS might help.

The DNS server IP might have to be changed in the router's or in the client's (PC) network settings, depending on how the network is set up. I suppose in doubt you can change the DNS in both.

https://developers.google.com/speed/public-dns
https://developers.google.com/speed/public-dns/docs/using

2nd tip from same source (thanks Nihilist):
Install Wine fully with all modules, download from WineHQ, not through the repository, and use WineTricks.

I don't think redirecting my network traffic to google's domain is a good idea. I use quad 9 and even then. (don't be a glowie)

This is probably a problem in proton, maybe it is making an incorrect sys call

Originally posted by CRT:

[...]

This is probably a problem in proton, maybe it is making an incorrect sys call

Just out of curiosity, why are you using the Windows version via Proton instead of the native Linux version?

Originally posted by Ahusharmuta:

I have no idea if it's supposed to be that way but when I launched TFC, went to "Find Servers", I got the "No servers" message. I still have not tried the game on Windows, I currently am on Linux, and would like to stay on Linux. Any ideas?

UPDATE: Indeed the issue is Linux, why? no clue.

The server list works flawlessly for me on the stable branch of Debian GNU/Linux with the native Steam app from the repository[packages.debian.org].

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2602526130