Same issue. I can select a character, then when tries to go into game I get a portal animation for a couple of seconds, then it's just a black screen with a sound symbol (and sounds) and two little arrows in the top right. Alt+F4 brings up a quit menu.

I've tried running it with both minimum graphics settings and max, but it doesn't make a difference.

Okay. I got it to work. Went to settings. - changed it to run in full screen instead of windowed mode and it launched.

Same issue.

Hit start. I get a launch image for a second or two.. then nothing. Running a "Check file" now to see if that helps.

Seems to crash on launch. Nothing running in the background and I can launch the launcher without conflict.