RE: How do I resolve an Internal QuickBooks Error and Why this is happening?
It occurs during the customer portion of the financial exchange or when user trying to access the Quickbooks Company file and display an error.
You can fix this issue by performing following solution:
Solution 1: Verify QuickBooks Desktop file’s data integrity
Solution 2: Remove POS from the Integrated Applications list
Solution 3: Toggle detailed exchange preference
Have queries? You can contact QuickBooks Point of Sale Support team.