Graph HTTP 500: {"error":{"code":"UnknownError","message":"500 INTERNAL SERVER ERROR","innerError":{"date":"2026-06-09T04:54:46","request-id":"350db87f-9864-4447-b3f2-4be07fcfd576","client-request-id":"350db87f-9864-4447-b3f2-4be07fcfd576"}}}