Unexpected errors

The game Diablo III is constantly crashing in the last 24 hours. I always get a message that the application encountered an unexpected error.

I have played this game for a few years in the same setup that I use for this season. I also got a necromancer for this season. Obviously, I paid for it.
So I paid for a game that does not work anymore?

There is a report ID for each crash. What should I do?