Saved Modules / Saved Rows / Saved Columns missing from front end editor

The options to select Saved Rows/Modules/Templates have disappeared in the editor.
The site is at

So far we haven’t found any errors with CSS etc., as was mentioned in other similar posts (Moved: Reply To: Saved Rows and Saved Modules not selectable in Builder)

Has anyone come across this and solved it?

Screen Shot 2020-03-18 at 5.16.06 PM

Did you look for error in the browser’s console (dev tools)?

Getting this error.

I would follow the plugins conflict troubleshooting procedure, basically disable all of them except BB, see if it fixes the issue, then enable them again one by one until the issue re-appear.
You can also temporarily change the theme.

You might have disabled them here