Thank you for replying. I have solved the issue. I compared the dev site and the live site, and realised the only diff was that the data was imported via the Duplicator plugin.I then dumped the dev site database and imported it directly via phpmyadmin, that solved the issue.
I also notice when I edit a additional field and remove the Required option, then error is Your changes were not saved due to an error (or you made none!).
I had the same issue so I added the dimensions per product L x W x H. That solved it for me. If someone finds an easier way please post it.
I do see a small “Welcome” just below Home. Is that the content?