---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/420028#article
headline: "420028: Knowledge source gateway timeout"
url: https://www.twilio.com/docs/api/errors/420028
inLanguage: en
dateModified: 2026-07-29T18:16:50.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 420028: Knowledge source gateway timeout

Log Type: TWILIO

Log Level: ERROR

## Description

The web crawler received a `504 Gateway Timeout` response when attempting to access the target URL during knowledge ingestion. The gateway or proxy server did not receive a timely response from an upstream server.

### Possible causes

* The upstream server is responding too slowly
* Network latency between the gateway and upstream server
* The target site's backend services are overloaded or slow
* Database queries or processing taking too long
* Network connectivity issues in the target site's infrastructure

### Possible solutions

* Verify the target URL loads within 30 seconds in a web browser
* Check if the target site is experiencing performance degradation or high load
* If the timeout is temporary, the crawler will retry on the next scheduled crawl
* For consistently slow URLs, consider reducing crawl depth to limit processing
* Contact the target site administrator if timeouts persist
* Consider downloading the content manually and uploading as files if the issue continues
* Review the knowledge source error details in the Twilio Console