"Error! Container is missing" and site SHS error

After the most recent update, I got “Error! Container is missing”

I found this thread and followed the instructions

I now get this error from the site SSH panel

** (myloader:902): CRITICAL **: the specified directory is not a mydumper backup

root@8622c69961f5:/#

Is there anything else I can do, or do I have to rebuild all my local sites?