Hi I have same issue. Any one has solution already?
[url=https://goo.gl/nooYAE][PayPal Direct] PayPal REST API Live issue - using nopCommerce 3.9[/url]
At least somebody replied (2 months later) :)
I hope somebody can solve this one?
Have you check with nopCommerce official support?
Did you get any update?
I just bought nopCommerce Premium support and asked them this issue.
Didn't know if this is the same situation you faced.