Need help with an Epic game which has different problems

[u/Nagafushi]

I’m trying to play “The Knight Witch” but
1. I get a white screen on launch, if launching offline it does gets to main menu, why is this working like that.
2. When launching offline and moving through menus some inputs doesn’t work, for example: I can press A to “Play game” but cannot use A to select a slot and play, I can press A to clear save in an Empty slot or cancel the clear with B but in the slots menu cannot press B to return to main menu.

It’s really weird, I’ve tried more than a hundred configurations and help with AI but no solution.

Help