ServiceNow REST API 401 Unauthorized via GC Webhook Action

Anyone free to help troubleshoot this webhook failure in Architect. The flow triggers correctly upon conversation end, but the subsequent REST API call to ServiceNow returns a 401 Unauthorized error. The endpoint is standard, and the credentials are stored in secure variables within GC.

The payload structure matches the SN documentation exactly. I have verified the OAuth token refresh mechanism is active, yet the integration fails consistently. Has anyone encountered similar authentication handshake issues when bridging Genesys Cloud webhooks to ServiceNow incident tables?