This usually happens because of restrictions placed on you by your PayPal account.
example:
We will add paid resources demo : paid resources content test
Are there any buyers on the purchase list? No
When automatic processing fails,you must add the license manually.
1.open dashboard
2. Click Manage Licenses and then click the Add Licenses button
3.add a membership license. You can set the start date and the end date of the license. Choose which resource you want to add?
and save it .
4. Now you can find purchase history for members. He can download it without credit.