Um, I’m really embarrassed to tell you.
All I did was realize that the username was case-sensitive. I, of course, always assume passwords are but it didn’t occur to me that the user name was.
But as soon as I entered the user name as JustLinda (instead of justlinda), voila’ – I was in.
{blushing} I’m sure I’m an embarrassment to my technical engineer husband. LOL