In trying to resolve my problem I opened Apps, tapped Gmail, and found "Open", "Disable", and "Force stop".
When I tapped "Disable" I got a warning that Android and other functions may no longer function as intended, so I tapped "Cancel" and backed out of that option.
Next, I tapped "Force stop" and got a warning that the app may misbehave, so I tapped "Cancel".
Then I tried "Passwords & accounts", tapped my google account address, but all that had was a "Remove account" button so I backed out of that.
If I long-tap the message on my Home screen, a "Remove" button appears at the top of my screen but if I tap that, nothing happens and the message remains on the Home screen.
So I fiddled with the message box, swiping it to the right/left/up/down and finally, after 3 or 4 swipes to the right, the message disappeared. When I turn the phone off and back on again, the message does not reappear, so I think that the problem is resolved.
I think.....
