HP Prime Issues

[BruceH]

It's 99.9% a Catalina issue. The problem is that sometimes (often?) Catalina gets confused and doesn't prompt the user to allow access when an app uses some restricted feature.

Go to System Preferences -> Security & Privacy -> Privacy tab > Input Monitoring (from the list on the left)

The HP Connectivity Kit app should appear here and be ticked. If it is un-ticked then tick it. If it doesn't appear then try the + key and browse to the app to add it. (You need to be an admin user to do this.)

Then go to Files and Folders and do the same. Hopefully that will be enough to fix it.