The user is receiving the below error message when attempting to publish an invoice.
Business Validation Error: You can't use a Creditors account on the detail portion of a Bill.
QuickBooks Online users
This error can happen if you select a Category that is not compatible with the Supplier Account selected for the invoice or simply the wrong Category.
To clear this error, you will need to determine which code is being flagged as incompatible by cross-checking with your QuickBooks company, and then allocate a compatible Category to this invoice before republishing.