Summary:
The following error message occurs upon transferring Vendor Bills to QuickBooks.
Reason from QuickBooks: The operation requested requires feature that has not been enabled. QuickBooks message: We're sorry. This feature is not included in your QuickBooks Online Essentials subscription.

Cause:
This issue occurs when using QuickBooks Online Essentials Edition. The Essentials Edition does not have the following features,
Expense and product/service tracking by client
Use billable expenses and products/services

Resolution:
Upgrade QuickBooks Online Essential Edition to QuickBooks Online Plus which enables the expense features in QuickBooks.