I have been using 2019 for a year then started to get the above error. I contacted support and they suggested I delete %temp% files & reinstall Suite 2019.
I did, but still the problem persisted.
After many hours of experimentation I found that if I created a new file with a background (I normally have no background) then I could transform an object.After that I could create a new file with no background and I could then transform an object in that file.
Hope this helps someone.