I'll take it as you're referring to the steps provided by IntuitChris, mgonsalves.
There's another way on how you can reverse an invoice payment. I'll show you how:
Click Sales in the left panel, select Customers.
Select the name of your customer.
In the Transaction List tab, click the paid invoice.
Click the 1 payment made link.
Click the date.
In the Receive Payment page, click More.
Click Yes to confirm the action.
I've also added screenshots as your visual guide:
However, if you're referring to the steps inside the link provided by JessH, you can do a basic troubleshooting step. In your phone, go to Settings, and then click Reset App Data.
I'm always around if you still need my help.
... View more