Symptom
You are seeing the below error when trying to publish an invoice to your accounting software.

Applies To
Purchase/Sales invoices.
Resolution
To clear this error please complete the follow steps:
Disconnect and reconnect your integration. For a guide on how to disconnect via the sync app please click here and for any other integration please click here.
Republish any impacted invoices.
Additional information
Please note this error will not clear until the invoice has successfully published to your accounting software. Please allow time for this to happen and ensure not to resync data.