Error: Twilio Error 11200

What's Causing This Error?

The HTTP retrieval failure, error 11200, occurs when an attempt to retrieve the content of a given URL fails. Several factors cause this error, including:

• The actual content is not matching with the Content-Type.
• The web server is temporarily unavailable.
• The web server is misconfigured.
• Network disruptions.
• The web server returns a 4xx or 5xx error to Twilio.

Solution - Here's How To Resolve It

There are multiple solutions you can use to try to solve this issue:

• Check whether the web server is responsive and up.
• Verify whether the URL host is not a private or local IP address.
• Determine the packet loss and ping times between the web server and www.twilio.com.
• If the URL refers to .xml or .html files, confirm the web server allows HTTP POST requests to static resources.
• Confirm that the TwiML URL does not return a 4xx or 5xx error.