ERR_NGROK_1202: You can't enable Google OAuth without first connecting a Google Apps login - ngrok documentation

What does ERR_NGROK_1202 mean?

ngrok returns ERR_NGROK_1202 with this message:

You can't enable Google OAuth without first connecting a Google Apps login.

Where can I get more help with ERR_NGROK_1202?

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