Your network automation script pushes structured log events to a centralized incident management platform via an HTTP webhook. After a recent update to the platform's ingestion endpoint, all log deliveries began failing. The script logs the following for each attempt: 'POST https://logs.example.com/v2/ingest returned 401 Unauthorized; body: {"error":"missing or invalid API token"}'. Local file logging continues to work normally. What is the most likely cause and appropriate fix?