ERR_NGROK_3162: PROVIDER has throttled this application and cannot be reached right now - ngrok documentation

What does ERR_NGROK_3162 mean?

ngrok returns ERR_NGROK_3162 with this message:

<PROVIDER> has throttled this application and cannot be reached right now.

Try again in about an hour.

Where can I get more help with ERR_NGROK_3162?

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