App is misconfigured for Facebook login : Kindle Fire Integration Issue

Question

We integrated Facebook login on our Kindle Fire android app. It works without any problem most of the time. But occasionally for some users, when they try to register using

Answer 1

Discovered an even easier way to deal with this on Kindle or any other device. If you have the FB app installed (in my case I didn't try other sign in paths but may work too?), and the login you're using is listed as a developer in the FB app at developer.facebook.com for the app in question, the hash will appear in the error message it gives you in the app itself. Says something to the effect of "Hash key xxxxxxxxxxxxxxxxx was not recognized. Manage your hash keys in the developer portal for app id yyyyyyyyyyyy".

Sorry if the text isn't exactly right, i didn't screenshot it prior to fixing the problem myself, but that's the gist of it.