Hi Shivam Goyal ,

Thanks for reaching out. Given the error message you've encountered, it seems like an unexpected issue with the API. Since you were able to create contacts successfully before, it might be a temporary issue or related to recent changes in the API or your application.

Here are a few steps you can take to troubleshoot and resolve the issue:

1. Check API Version: Ensure you are using the correct version of the API. Sage has different versions for its API (API v3 and API v1+v2). You can find more information at Sage Developer Portal.

2. Review Integration Guidelines: Make sure your integration follows the guidelines provided by Sage for third-party integrations. Information on how to access and integrate with the API is available at the same link above.

3. Contact Technical Support: Since the error is unexpected and not self-explanatory, reaching out to Sage's dedicated technical support might provide more insight. You can contact them at [email protected] for assistance specifically related to API integration.

4. Live Chat Support: For immediate assistance, you can use the live chat feature available in your account (Monday to Friday). This can be accessed from the Bubble Icon in the top bar menu of your account, both in the product and on SageCity.com/Resources for US and Canada users.

If the problem persists, it's important to check if there have been any changes in your application that might be causing this issue or if there are any recent updates in the Sage API that you might need to adapt to.

Hope this helps. Let us know if you need further assistance!

Warm Regards,
Erzsi