Stuck in "The connection to the host has been lost. You will be returned to the multiplayer menu."

[equilibrium]

So when i start up Warframe i get the error message below.
I can click on "ok" and then i get a blackscrreen and again it puts me into this error message with the difference that now i cant click "ok". I dont see my mouse but if i move it the ok button is lighting up at some point so the mouse is acctually there but not showing. I cant click thou and controller Imput also doesnt work. Esc does nothing too. This happens every time i try to login. I tried HomeNet, PhoneNet and VPN and nothing works to get me past this. Obv did a restart of my PC. 

Did anyone encounter this problem before? Is there a fix?

Solved: I think my VPN tampered with the client executable so that it would never be able to connect without it for KILLSWITCH reasons.