I have a cartthrob setup selling 30 day access to channel entries. A customer purchased access but the payment didn't go through paypal express giving the error "10416 Transaction refused because of an invalid argument."
Customer was still able to access the channel entry even though the payment hadn't completed.
I feel this is a paypal express problem more that a CT one but wondering if anyone here has experienced similar issues and what the workaround is (other than not using paypal)
Running EE 2.5.5 and CT 2.3.4 for what it's worth