> ## 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 5319

## ERR\_NGROK\_5319

Failed to complete IdP-initiated SAML login. The RelayState specified an invalid domain "`DOMAIN`" to redirect to. Ensure that the domain "`DOMAIN`" is configured as a hostport for "`EDGID`".

## 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_5319)