This has happened occasionally before, usually around the time they do weekly maintenance. It's always possible it's a decision to remove it for some reason, but more likely something in the computer update process that doesn't mean anything. If it's still not around in a week, we'll see.
Yup. I assumed as much but decided to ask everyone here. I think that more than likely, if many of us experience it, it's a technical glitch.
Waiting to see.
Thanks for the response.