cordova-samples | Visual Studio Tools for Apache Cordova - Sample Apps | Mobile Application library

It sounds like you may not have installed the necessary Cordova plugins. Taken from the readme with the quickstart sample:

Several Cordova plugins are required for use with @auth0/cordova. Install safariviewcontroller and customurlscheme with the following commands.

cordova plugin add cordova-plugin-safariviewcontroller

cordova plugin add cordova-plugin-customurlscheme --variable URL_SCHEME={YOUR_PACKAGE_ID} --variable ANDROID_SCHEME={YOUR_PACKAGE_ID} --variable ANDROID_HOST={YOUR_AUTH0_DOMAIN} --variable ANDROID_PATHPREFIX=/cordova/{YOUR_PACKAGE_ID}/callback

The variables used when installing cordova-plugin-customurlscheme are the same as those used to set up the Callback URL in your Auth0 Dashboard.

In other words, just run those two commands above in your favourite commant prompt / terminal. That second instruction looks a bit overwhelming - but if you are using the default package id (that comes with the quickstart) - then just use:

cordova plugin add cordova-plugin-customurlscheme --variable URL_SCHEME=com.auth0.cordova.example --variable ANDROID_SCHEME=com.auth0.cordova.example --variable ANDROID_HOST={YOUR_TENANT}.auth0.com --variable ANDROID_PATHPREFIX=/cordova/com.auth0.cordova.example/callback

and replace {YOUR_TENANT} with your own Auth0 Tenant.

By the way, the allowed callback URL in your Auth0 dashboard should also look like this (again, assuming you are using the default package identifier):

com.auth0.cordova.example://{YOUR_TENANT}.auth0.com/cordova/com.auth0.cordova.example/callback

Of course, let me know if this does not solve your issue by leaving comments below. Good luck.