JavaScript (jQuery) preloader page not working

I have this preloader code for my website. It uses jQuery 1.8.3, which I know is quite old, but it's what worked for me.

The thing is that since I installed my SSL certificate on my website, the preloader doesn't go away.

This is the code:

jQuery(document).ready(function ($) {
        $(window).load(function () {
            setTimeout(function(){
                $('#preloader').fadeOut(150, function () {
                });
            },1500);

        });
    });

It is made to have a wait, and then hide the preloader.

Thanks in advance!