Acrobat Pro opens to completely blank window
The initial problem was that when the user opened a PDF, Acrobat Pro showed white bars on the top, left, and right of the window, hiding all the functions, and about 15 dialogs popped up saying, "An internal error occurred."
As a result, I completely removed Adobe Acrobat, Creative Cloud, etc, and reinstalled it from scratch by downloading the Creative Cloud app at https://www.adobe.com/creativecloud/desktop-app.html.
After reinstall, any attempt to open Acrobat shows the below window, and nothing responds in the window except the close (X) button.

I've searched online for similar issues and haven't found anything that helps.
What can I do to assist the user? - nbb
