We are running the test server internally just to make sure our changes aren't causing critical bugs. It's not available to players right now, this is why you are getting the incorrect version error. When it's ready for players again, you will be able to select Test Server and connect.Just so I am clear...
There is a test server - how do we/ or can we access it?
There is just too much happening this week. Our new physical servers are ready, so we're setting those up. Our website is in transition. There are many changes and we're checking everything a bit frantically right now.