Tom,
As you know I am having the same issue however with my two Facebook widgets that worked perfectly until your latest upgrade to 1.3.28. You have kindly send me the older version 1.3.27 however on the WordPress themes generatepress folder there is no place to upload an unzipped file, only a .json file. Where do I upload the unzipped file from? Thanks – this is urgent!
Cynthia A. Silk