Graph HTTP 500: {"error":{"code":"UnknownError","message":"500 INTERNAL SERVER ERROR","innerError":{"date":"2026-06-09T04:57:41","request-id":"9f15fd6b-8070-4c59-84e5-2ca7dfc930e2","client-request-id":"9f15fd6b-8070-4c59-84e5-2ca7dfc930e2"}}}