ERR_NGROK_2063: The method METHOD was specified multiple times for the path PATH - ngrok documentation

What does ERR_NGROK_2063 mean?

ngrok returns ERR_NGROK_2063 with this message:

The method <METHOD> was specified multiple times for the path <PATH>. Each method must be unique among all rules with the same path.

Where can I get more help with ERR_NGROK_2063?

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