ERR_NGROK_306

Message

Only Personal, Pro and Enterprise plans may use custom hostnames. Failed to bind the custom hostname HOSTNAME for an unauthenticated client. Sign up at: https://dashboard.ngrok.com/signup

If you have already signed up, make sure your authtoken is installed. Your authtoken is available on your dashboard: https://dashboard.ngrok.com/get-started/your-authtoken

Further help

If you're having trouble resolving this error, please reach out to support@ngrok.com

Additional Information

Using a custom domain such as app.example.com requires a paid ngrok plan. You can upgrade to a paid plan under the Billing section in the ngrok Dashboard. Once you upgrade, you will be able to register and use a custom domain immediately.

Possible Solutions

Upgrade to a paid plan in the ngrok Dashboard under the Billing section. You will need a Personal, Pro or Enterprise plan to use a custom hostname.

If you haven't already, add your authtoken from your account dashboard to your ngrok agent in your terminal using ngrok config add-authtoken TOKEN.