Try to join the server from "connect" button in home page, or try to reboot your modem.
What happens if you connect?
Can you even ping to it? Start > cmd > ping s2.cit.gg
this happend to me and some of my friends it's a random bug I fixed it by uninstalling MTA and re downloading it but others fixed it by restarting there routers try both of them if one of them worked , it happend to around 6 players maybe it was a bug because of the server was lagging yesterday .
It was some server's host issues, but I guess arran fixed it already, no? Try to login now
Still... I have the same problem now, and I've done everything, reinstalled MTA & GTA SA, Installed MTA Nighty update etc..Minimum = 106ms, Maximum = 109ms, Average = 106ms@Thunder I entered 2 random servers and played on them for a few minutes. Then I tried again on CIT and the problem solved, try it.