500 Error Creating Invoices since 2025.7

[martic]

We are using the MYOB Server API hosted locally and since release of 2025.7 we have been unable to create Invoices via the API.

We are using the latest MYOB.AccountRight.API.SDK 2025.5.658

When Adding a new invoice:
ServiceInvoice newInvoice = _serviceInvoiceService.InsertEx(_companyFile, invoice, _companyFileCredentials, ErrorLevel.WarningsAsErrors);

Receiving errors:
Invoice Exception: Encountered a communication error (http://localhost:8080/AccountRight/xxx-xxx/Sale/Invoice/Service/?warningsAsErrors=true&returnBody=true)
Inner exception: The remote server returned an error: (500) Internal Server Error.

[martic]

I put in a support request and received this response:

We’ve just released AccountRight 2025.7, and if your server has auto-updated while your app is still referencing the 2025.5.658 SDK, that mismatch can often surface as a generic 500 error when creating invoices.

The first step is to update your project to the 2025.7 SDK so it aligns with the server version. Once updated, restart the AccountRight API and Server services and try the request again.

I can't find any announcements that the API has changed in the latest 2025.7 API release notes.
https://apisupport.myob.com/hc/en-us/articles/13500605326479-Developer-Update-August-2025

But this release announcement does mention you can now attach files to the invoice, which I assume would require an API change.
https://www.myob.com/au/support/myob-business/product-account/myob-business-release-notes?productview=Desktop

There has been no update the API documentation to reflect this change:
https://developer.myob.com/api/myob-business-api/v2/sale/invoice/invoice_service/

This raises questions for me:

• Are the SDK team not aligned with the API release cycle?
• Where now is the official channel to advise of API updates?
• When will the API documentation be updated?

Thankyou.