> ## Documentation Index
> Fetch the complete documentation index at: https://ngrok.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Error 9019

## ERR\_NGROK\_9019

Your legacy account is not authorized to use mutual TLS.

Contact us at: [sales@ngrok.com](mailto:sales@ngrok.com)

## Further help

If you're having trouble resolving this error, please reach out to [support@ngrok.com](mailto:support@ngrok.com?subject=Help%20with%20ERR_NGROK_9019)