I have the exact same error unfortunately.
I have tried to set the IPN as https://eiqumusic.com/?ms-action=ipn. but it hasnt changed anything.
I receive the paypal money, IPN is enabled with above URL. I barely have any plugins on my website that could be blocking it.
Buyer doesn’t receive download email, and I don’t see any purchases in my music store.
In my paypal the IPN seems to work as it is accepting my incomming payments and their status is “Completed”
Please help, I really want to use and upgrade this plugin, but I need to make sure it works first!
