Fields Factory Section is Missing in edit area

Hi,

I used this plugin successfully for some time. At some point, a year or so ago, the fields factory section disappeared from the plugin.

When I go to a Product field group, I see the title, then the Conditions section, below it the Field location section and to the right the Fields Type section. There is nowhere to drag the field types to and for groups I set up in the past, there is no view of the fields I had set up.

The fields still show in the products on the front end.

I’d like to be able to use the plugin but don’t know how to correct this issue. Please advise.

thanks,
Jeff