Wordpress : Mixed Content Warnings with HTTPS

If want to make sure that your server/website is ready to handle HTTPS traffic. You can do this via your /wp-config.php file.

/* Handle HTTPS Protocol */
if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
  $_SERVER['HTTPS']='on';

This will make it so that your website/server accepts all HTTPS requests, and also enables HTTPS