---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/420033#article
headline: "420033: Knowledge source internal server error"
url: https://www.twilio.com/docs/api/errors/420033
inLanguage: en
dateModified: 2026-07-29T18:16:50.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 420033: Knowledge source internal server error

Log Type: TWILIO

Log Level: ERROR

## Description

The web crawler received a `500 Internal Server Error` response when attempting to access the target URL during knowledge ingestion. The target server encountered an unexpected condition.

### Possible causes

* The target server is experiencing internal errors or bugs
* Server-side application or script failures
* Database or backend service failures on the target site
* Server misconfigurations or resource exhaustion
* Temporary server issues or maintenance

### Possible solutions

* Verify the target URL loads correctly in a web browser
* Check if the target site is reporting service issues or outages
* If the error is temporary, the crawler will retry on the next scheduled crawl
* For persistent errors, contact the target site administrator
* Consider using a different URL or downloading the content manually as a file
* Review the knowledge source error details in the Twilio Console