Why the Sync Error occurs
This error occurs when you link a vendor invoice to a PO in Sage Intacct, and that vendor invoice tries to sync as a bill to Bill.com, but a line item(s) amount on the bill does not match the line item(s) amount on the PO in Bill.com.
How to Fix the Sync Error
Edit the PO or the vendor invoice in Sage Intacct so all lines on the vendor invoice have the same amounts as the lines on the PO, and sync again.