Running Nop 3.8 with eBay plugin trial, using a production (not Sandbox) key.
Errors below -
PayPal added as a payment method because you have set your preference to offer PayPal on all listings. (this one didnt seem like an error, just an alert)
A return policy must be specified. (A return policy has been specified in both the plugin settings and the store settings)
Condition is not applicable for this category. The condition value submitted has been dropped. (this one didnt seem like an error, just an alert)
At least one valid shipping service must be specified. (I have two valid shipping services specified)
The only other thing I noticed that was odd is that in the PDF instruction for the plugin it mentions in step H ship to locations - but my plugin only has a menu option for shipping method not mentioning where I am willing to ship to.
Any helpful suggestions would be appreciated!