Hi David,
Still seeing the same message, please check the the last log file, once you scroll down, you will see it.
https://www.dropbox.com/s/0i49g9c1rx1z4k6/updraftlastlog.txt
Honestly, I push backup every few hours, and I have tested your Plugin by Restoring the whole website, it Works like Charm! Amazing Plugin!
Thank you Sir for providing us with Great Plugin :) If possible to fix this issue would be great.
Have a nice day!
Imad