Hello, you have to follow the steps that g-bo leaves on the main page to solve that black screen error when connecting to Facebook.
And regarding the key hash error, it is likely that you have tried to enter version 5.2.2 with the avatar having cosmetics, clothing or hairstyle that came out after that version and that is why it gives me an error when entering, or am I wrong and am I still Have you not entered version 5.2.2?