Hey,
Are you still having issues? Have you double checked if you use the appId, and not the appSecret (they can be easily confused, as they have the same length)
To test just the server part (without your app involvement), you can just create an app and open the url in your browser:
http://172.30.190.66/authn/verify/REPLACE_WITH_APP_ID/test
You should see the permissions dialogue