I'm using facebook-sdk-codeigniter library for login with facebook few days back it was worked well now it shows
Insecure Login Blocked: You can't get an access token or log in to this app from an insecure page. Try re-loading the page as https://
$config['facebook_app_id'] = '';
$config['facebook_app_secret'] = '';
$config['facebook_login_type'] = 'web';
$config['facebook_login_redirect_url'] = 'facebook_login';
$config['facebook_logout_redirect_url'] = 'logout';
$config['facebook_permissions'] = array('public_profile', 'publish_actions', 'email');
$config['facebook_graph_version'] = 'v2.6';
$config['facebook_auth_on_load'] = TRUE;