ERR_NGROK_1409: IP Policy Rule CIDR CIDR must be specified using the lowest IP address in the range - ngrok documentation

What does ERR_NGROK_1409 mean?

ngrok returns ERR_NGROK_1409 with this message:

IP Policy Rule CIDR <CIDR> must be specified using the lowest IP address in the range. Did you mean <SUGGESTION>?

Where can I get more help with ERR_NGROK_1409?

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