I occurred a week ago , i can click and write but the screen is staying black no matter what. Its usable but i can't see what i am doing. If i log in its still black screen. When I launch the actual minecraft it works whit the servers and everything but the launcher still stays black. Even re-installing it doesn't fix it.
Update 2 :

Its not a duplicate because my game doesn't crash or close itseft it works but only on some sizes, Also the menu where you can select versions is black no matter what i do, But its still clickable and it works. Althought its very hard to hit the correct version.