Mageia 7, Plasma/KDE 5, PrtScn

Is it just me, or is it impossible to get the print screen key (PrtScn) to launch anything with shortcuts, much less a screen capture program? Worked fine in Mageia 5/KDE. Strangely, all my media keys on the keyboard work fine, and I can even map the "Favorites" key (looks like a star) to call a screen locker. But nothing seems to work with PrtScn. It is just a plain 'ol Microsoft Natural Ergonomic 4000 keyboard.
When I set the trigger and press the key, it says "Print", so the mapping is correct. I tried the default "Action", I tried various things there with no effect. Pressing the "Call" on-screen button works, pressing "PrtScn" results in nothing. I even turned that off and tried launching the program directly with one of the "Examples". Nada! Sometimes the simplest little things....
When I set the trigger and press the key, it says "Print", so the mapping is correct. I tried the default "Action", I tried various things there with no effect. Pressing the "Call" on-screen button works, pressing "PrtScn" results in nothing. I even turned that off and tried launching the program directly with one of the "Examples". Nada! Sometimes the simplest little things....