There are many reasons why a screen may be black. The first things to check are mostly obvious:
If the player's boot sequence (which includes a Scala logo on the upper right) is visible, but the display then goes black:
Depending on the display resolution and the scaling setting, the OK and Cancel buttons in the Player Configuration tool may have been pushed off the bottom of the display. Here are some things you can do, in Windows Settings, under System then Display:
You can always use the hotkeys (Alt+O for OK, Alt+C or ESC for Cancel) even if the buttons are not visible.