The trouble with a one click operation, if it doesn’t work, you have nowhere to troubleshoot. And, of course, after trying to set i up all day without Nabu Casa, I tried it. Could be dozens of things wrong, but it didn’t work for me. Says authentication fails. I’m guessing it is something about what I did already trying to do it manually. But I give up for the day.
There is a support email address for Nabu Casa.
It is working now. Not quite sure why, but I may have been entering the wrong password. That would do it 