Can't Login to Any Servers

Since I first tried about 4 hours ago I have not been able to login to any of the servers I play on.  I get to through the login screen & it just kicks me back to the main screen.  I was able to get on once about 2 hours ago for about 5 minutes & then it froze and same problem.  I have tried clearing my cache as well as using a different browser (usually use Google Chrome; tried Microsoft Edge) and same problem on both.