Nostalrius Begins - Quality wow vanilla realm (1.12)

So ive been playing this server on and off for a couple of months and after my latest short absence i cant get on anymore. It gets all the way through the log in process and says unable to connect at the last second. Im confused cause i havent changed or even touched my PC in the last month so i dont know whats different.... any tips would be appreciated.

Having same issue this morning on for ten minutes, booted, can't connect, get disconnected after the login process, etc.