http twitter link

In simple-events-calendar.php in the following function

function SE_public_scripts() {
    global $sec_options;
    if(!is_admin() && get_option('SE_twitter') == "yes") wp_enqueue_script('tweetevents', 'https://platform.twitter.com/widgets.js', '', SE_VERSION , true);
}

The twitter link to widgets is called over http this causes this resource to be blocked by default by the web browser (firefox 42.0 / chrome 47.0) when running on a https site. It would be better to move this to reference the protocol (http / https) in use.

https://www.ads-software.com/plugins/simple-events-calendar/