420027: Knowledge source service unavailable

The web crawler received a 503 Service Unavailable response when attempting to access the target URL during knowledge ingestion. The target server is temporarily unable to handle the request.

• The target site is undergoing maintenance
• Server overload or resource exhaustion
• Temporary service outages or disruptions
• The site is intentionally down for upgrades
• Backend services or databases are unavailable

• Verify the target URL loads correctly in a web browser
• Check if the target site has announced maintenance windows or service issues
• If the error is temporary, the crawler will automatically retry on the next scheduled crawl
• For persistent unavailability, verify the URL is correct and the site is operational
• Consider scheduling crawls during times when the site is less likely to be under maintenance
• Review the knowledge source error details in the Twilio Console