Can’t join any server, at all. Not sure when this started happening. Been absent from BRINK for a while. But I was able to play BRINK without any problems after its release for weeks.
Eventually, I deleted both the brinkconfig.cfg and autoexec.cfg files. After that, I managed to join some servers. Being happy and thinking I fixed the issue, I changed the settings accordingly like they were before. Then I was unable to join any server again. So I just gave in, thought that perhaps I was using some cvar that the servers didn’t like or something. Once again did I delete the .cfgs files. But now I still can’t join. 
Added info: I deleted any .cfg files in both my Steam/SteamApps/Common folder as well as in the Steam/userdata/etc… folder.
Added info #2: No changes whatsoever have been made to my router. No port forwarding changes or anything.
I’d really hate to delete all the content and redownload all 5.8gb of it again.
So please, anyone from Splash Damage or anyone else who fixed this similar problem, please help.
Much obliged!