When I attempt to connect to a server, after a 20 - 30 second wait an error message pops up saying I'm unable to connect to the server.

 

I've read through other topics/threads on the forum and I've tried different fixes, (making sure game is up to date, opening 3074 UDP, etc.) and nothing has worked yet. Is there anything else I'm able to do?

 

Thank you in advance for any help offered.

Keep trying windows time synch (make sure the synch doesn't fail).

You can also try rebooting your router (although I never experienced it, some people claim that the gateway's time can have some influence on it).