Shift F5 no longer works correctly
Mac Pro: Version 10.14.5
Adobe PS: 21.1.2
Suddenly today Shift F5 stopped working for fill. This is a shortcut I use many times daily. The message I got was this:

I never use this, and I don't know how it got this way. So I went to Edit -> Keyboard Shortcuts, and changed it back to Shift+F5 = Fill. I can see in the menu that it's set to fill, but still, whenever I try and use it, I get the message saying "grow is not currently available".
Why is this happening, and how can I fix it?


