Updated to Catalina- can not open APP store
I have recently updated to Catalina, now Imovie, Excel and Word need to be updated. When I try to open the app store it will not open and only shows a blank screen.
I have tried all of the following fixes suggested here https://appletoolbox.com/app-store-not-working-in-macos-catalina-how-to-fix/ but have not had any success.
Any help would be greatly appreciated
iMac 21.5", macOS 10.15