QuickBooks Online Error: Business Validation Error: Unexpected Internal Error. (-30000)

Exporting customer and getting the error "Business Validation Error: Unexpected Internal Error. (-30000) in QuickBooks Online. 

Verify in QuickBooks Online if customer information has a value in "Customer Type".

If so, rename the customer in QuickBooks Online. 

Re-export the customer from AdvancePro. 

Once successfully exported to QuickBooks Online, merge and verify the customer type does not have a value.