You may need to update credit card information first before you can successfully pay a failed invoice payment.
Add a Credit Card in Stripe
Look Up Failed Installment Payments
https://engagesports.zendesk.com/hc/en-us/articles/203511485-Look-up-Failed-Installment-Payments
To Pay invoices that did not pay automatically due to a declined credit card follow these steps:
Find the Customer by typing name in search window or look up failed installment payments
Select the Customer Name
Go to Invoice Section
Select Oldest Unpaid Invoice - Unpaid invoice amounts are gray paid amounts are blue. (You may need to click View all invoices to get to the oldest one)
Select Retry Now
If there is more than one unpaid invoice you can move to the next oldest until all invoices are paid