You are processing a credit card charge for a customer.
The pop up says "Payment is processing. Please see payment details for more information", but after the screen refreshes, there's no payment applied to the invoice.
First start by reviewing the declined tab within the payment screen of your customers profile:
If you would like additional details as to why the charge has declined, we recommend reviewing the charges through Fiserv (Card Pointe).
Select Reporting / Transactions:
You can click on the transaction number to view the details of the charge and the reason why the charge declined.