Invisible Client / Log In Screen?

So this has happened to me a couple times then went a way for a bit then came back. I wanted to play the game, and after you hit play as soon as you open the client it goes invisible. There's a couple of spots I can hover over to type and a few clicking spots to take me to sign up at the log in screen but that's it. I've tried repairing and reinstalling, and still have nothing. If anyone can help me out here it would be really appreciated.

Thanks in advance