I have a problem with my The Witcher 3 Game. Suddently it started doing this strange thing:

When I open the game suddently the play button gets grey and then green again.

Verify / repair your installation.

Same here.

I stopped playing it in May 2016, Hearts of stone almost finished.
I wanted to play again a month ago and had this strange behavior. Two weeks ago Geforce Experience was not loaded on startup, at least the symbol in the sys tray was not present. What should I say, The Witcher worked like a charm and since one week I have the same behavior again.

It seems that there is no log file I can root cause the problem - even event viewer logs nothing.

This sucks big time.

Are there any solutions? Verify/repair does not work.

Thanks for any feedback!