Fergus Integration Error: NoTaxCodeFound

Hello,

I am having an issue with an integration between Fergus and MYOB. The Fergus support and technical team say the issue is being caused by MYOB.

I setup MYOB 2 days ago and am on a trial. On the first day, I was able to sync supplier invoices between Fergus and MYOB. The integration worked and the invoices appeared in the MYOB In tray, ready for coding.  However, the next day (24 hours later) the integration stopped working. Supplier invoices no longer appear in the MYOB In tray and there is an error showing in Fergus.

On the Fergus side, there is an erorr against each invoice saying "Error sending to MYOB: NoTaxCodeFound" (see screenshot below).

I contacted Fergus support yesterday and they said nothing has changed on their side of the integration. They confirmed that the invoices were successfully "sent" to MYOB from their server and they showed me the code steps to prove that their programme was working correctly to send the data through the API. I also confirmed that there have been no changes to any tax codes on the MYOB side. It is still setup to use the default New Zealand GST codes, I have not changed them.

So that leaves me to ask... what has changed on the MYOB side?

I have performed the following steps multiple times (3 times total):

1. Disconnected the integration between Fergus and MYOB

2. Cleared my cache and logged out completely of all applications

3. Reconnected the integration between Fergus and MYOB

4. Refreshed MYOB data in Fergus and clicked "send to MYOB" on the invoices again

Can someone help with this error? If MYOB can't work with Fergus I'm kinda done here.