ERR_NGROK_SHIP_CPU_MILLICORES_OUT_OF_RANGE: The 'cpu_millicores' field must be 0 or more, got VALUE - ngrok documentation

What does ERR_NGROK_SHIP_CPU_MILLICORES_OUT_OF_RANGE mean?

ngrok returns ERR_NGROK_SHIP_CPU_MILLICORES_OUT_OF_RANGE with this message:

The 'cpu_millicores' field must be 0 or more, got <VALUE>. 0 uses the default.

Where can I get more help with ERR_NGROK_SHIP_CPU_MILLICORES_OUT_OF_RANGE?

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