This solution worked for me:
- Go to Settings tab in your facebook application and in Basic tab scrolldown to +Add Platform
- Click on +Add Platform and choose Website
- Add your url of your website (for me, was the same url added on Advanced tab on Redirect URIs)
- Save changes and test again.
Also I made a youtube video to solve this problem: https://www.youtube.com/watch?v=7CNpLgwa0-c