The Cleopatra Server has been synced to the most recent Retail Patch. The current accepted connecting client version is now Ver. 30170304_1. If you are not on the latest client version, you will not be able to connect. If you are on an earlier version, you will need to force a client update by following the directions here.
If you are currently online at the time of this post, you will be forced to update the next time you log in.