Hi Kim,
On checking your help documents, there are no mention of settings on the shopify side of things.
E.g When creating developer app i.e – how you get the api keys, I remember you set read and write permissions against certain functions.
These have again changed recently or at least changed from the documents for the other plugin I used.
Maybe worth if I have my permissions set the same as yours where yours for your dev sites ?
Regards,
John,