I can’t edit a shared spreadsheet in Numbers and an alert pops up to say a new update available.

So one would think I need to update Numbers, right?

But no, I have the most current update, so after the app directs me to the App Store to update, my only option is to open the app again.

I have restarted the app, and also restarted the computer, but still get the same thing.

AAAARGH!