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I had the exact same problem which popped up last few days or so. I fixed it by generating the respective platforms in the app's settings. Note that I only had the general settings before and it worked, but something probably been changed recently.
- Go to he settings section of your app in Facebook (Facebook developers > My Apps then Settings)
- Under the Basics make sure you have the respective platform. If you do and it is still not working, then remove and recreate it. Otherwise, click on [+ Add Platform] and follow the instructions. For example, for Android you need to provide:a) Your package idb) Your launcher activity full namec) Key hash - which you need to generate as per instructions using keytool and openssl
good luck!
I have solved this by using replace the redirect URL: http://localhost/callback
For more info visit:http://ngcordova.com/docs/plugins/oauth/
well, in my case i have not made the app public .go to app review part of your app and turn "Make your app public?" to yes .try it worked for me