Hi @gdnwebmedia ,
Thank you so much for the credential after 6 months 
Anyway, please note that your function is going to return Image URL and the image might not be inside Media Library. Hence, your image will not work.
Please use the function in External URL field.
If you want it to work in Dynamic Data field, have to ensure the image is located inside the media library and return the media ID.
This is the result
Regards,
Jenn