URL blocked: This redirect failed and debuging says response status code 401 does not allow login through facebook

Question

I'm using nopcommerce 3.9 and getting this error I'm not using any plugin for this but I'm using custom code provided by facebook for login. I'm getting the following error :

URL blocked: This redirect failed because the redirect URI is not white-listed in the app's client OAuth settings. Make sure that the client and web OAuth logins are on and add all your app domains as valid OAuth redirect URIs.

My redirect uri is : https://mya.abcwebsite.com/dashboard

Also when i debug code I found this error Response status code : 401

I have tried changing my redirect Uri but it didn't work

 protected override Task ApplyResponseChallengeAsync()
 {
            var sessionIdlocal = getSessionId();             

            if (Response.StatusCode != 401)
            {
                return Task.FromResult<object>(null);
            }
 }

Answer 1

Go to this link https://developers.facebook.com and added all the possible urls of my domain and sub domain and turned on the Client 1. OAuth Log 2. Web OAuth Login

in settings for Facebook under App review and my issue is resolved.Only the configuration was needed to redone. :)