Workflow or API calls:
METHOD: GET
URL: https://api.sandboxcernermillennium.com/<tenant>/message/20241001/patientMessages/inboxItems?createDateTimeGreaterThanOrEqualTo=2020-01-01T00:00:00Z&createDateTimeLessThanOrEqualTo=2025-11-04T11:31:03Z&patientId=9859041
Hello everyone,
I'm experiencing an issue with an integration that suddenly stopped working, and I would appreciate your help.
I have an Oracle Health EHR URL/endpoints that was working perfectly until a few days ago. However, when making the same request today, I'm receiving the following error:
**Error:** Default backend - 404 not found
This behavior is affecting all the existing endpoints for EHR that i'm consuming. Please let me know if you need a specific information that I can share.
1. Are there any known changes to Oracle Health EHR infrastructure or endpoints that could cause this behavior?
2. Does the "default backend" message suggest a load balancer or routing configuration issue?
3. Is there any communication about maintenance or API changes? Any guidance would be greatly appreciated.
Thank you in advance.
Expected Result:
HTTP 200 Success
{
"items": [
{ “DATA” }
]
Actual Result:
X-Request-Id / Cerner-Correlation-Id: /EA54595A8F614B85854E7F267401C66B+4388 / opc-request-id: /EA54595A8F614B85854E7F267401C66B/31655F6E30A245008850C172D4AD660F
Date/time of the example:Mon, 06 Apr 2026 18:10:09 GMT