Musescore will not load or display scores.

Musescore 4 opens, meaning that the icon appears in the task bar, but it will not open any score file, New or old, An additional Musescore icon appears, and if i click on the icon and click on "open", a black page with the file title in the upper left corner appears but the file itself does not open. I have tried "modify repair" and have uninstalled and re-installed the program to no avail.