FSTL004 - Fastly API Connection Timed Out

Agent error code #FSTL004 indicates the Fastly API did not answer within the agent's timeout.

Common causes include:

• Packet loss or a saturated link between the agent and Fastly
• A proxy holding the connection open without forwarding it
• A Fastly incident

Steps to Resolve

1. Check Fastly's status page for a current incident
2. From the agent host, time a request to https://api.fastly.com and compare it against the agent's 20 second per-request budget
3. If a proxy sits in the path, check its own logs for the stalled request

The grant that timed out is reported as failed rather than being re-applied on its own, so once the link is healthy the user requests access again.