Can't run multiple ngrok tunnels using config file

I would like to run multiple Ngrok subdomains

I have created an ngrok.yml file

tunnels:
  teams:
    proto: http
    addr: 8000
    subdomain: expl
  jira:
    proto: http
    addr: 8080
    subdomain: expl2

Then I run ./ngrok start teams -config=ngrok.yml

I have a Basic plan I have already registres my authtoken.

But I get this message

Only paid plans may bind custom subdomains.

Failed to bind the custom subdomain 'explore' 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

ERR_NGROK_305

But I'm able to run a single subdomain tunnel using command : ./ngrok http -hostname=exple 3000, it works

Solution

Can you double check that you have included your authtoken: <TOKEN> at the top of your new config? That would explain why the single command works (because it is using the original config with the authtoken) but the command pointing to a new config does not.