When i go into the charakter selection almost everything is pink, a few parts of the models can be seen.
It is possible to pick and go to the fight. The PInk grafic failure appears more or less strong in different maps.

I don't have this issue myself, but it sounds like it relates to your video card/video card drivers and how they are working with the game.

What video card are you using? You should post your system specs, including your video card and driver version, RAM amount, processor type, and operating system.

One thing I can suggest, if you haven't done so, is make sure your video card drivers are up-to-date.