Navigation is unreachable error

I am developing a mobile app with Ionic 3 and trying to integrate Auth0 login.
I followed all the required steps. Now I can see Auth0 login page.
But when I click on Sign in with google, the loading indicator keeps spinning and the page does not redirect.
I get the following warning on console:

Navigation is unreachable: io.ionic.starter://mtouch.auth0.com/cordova/io.ionic.starter/callback?code=DEGESHiVGfQT_g9S&state=30dU9lwY3WpeD0UxUtoasFjV8ejdcMW9ksJcLyh2F_c#

I am experiencing the same issue with an Ionic App…

I found the issue in my case: I forgot to remove some Brackets ({, }) around my App ID when I was adding cordova-plugin-customurlsheme.