You may not run more than
MAX tunnels over a single ngrok session without an account.
You may increase this limit by signing up and upgrading.
The tunnels already running on this session are:
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
If you're having trouble resolving this error, please reach out to firstname.lastname@example.org