ERR_NGROK_3124: The state parameter required to finish authorization with PROVIDER does not match this host - ngrok documentation

What does ERR_NGROK_3124 mean?

ngrok returns ERR_NGROK_3124 with this message:

The state parameter required to finish authorization with <PROVIDER> does not match this host.

Try again.

Where can I get more help with ERR_NGROK_3124?

Email support@ngrok.com and include the error code.