10.1 Server Down

If you're refering to those servers not yet having been updated, you can use the already mentioned workaround to connect to them.

We're also aware of an issue that prevents some players to join some servers and are currently investigating it to provide a hotfix as soon as the issue has been identified and fixed. If you are affected by that, providing the server log, the save and the exact ingame names of affected users to [email protected] would help us.