Error stops the script: Cannot read property 'nodeType' of undefined

I'm trying to implement the following random script into this site and from console I get Uncaught TypeError: Cannot read property 'nodeType' of undefined.

The problem is that it stops the whole site page to load specifics parts of the javascript that make's it responsive.

This is the random function:

/*! jQuery randomizer v0.4.0 | (c) 2014 Aram Mkrtchyan | http://ift.tt/2eu34S4
 *
 */
(function ($) {
    $.fn.randomizer = function (options) {

        var settings = $.extend({
            resize: false,
            fade: false,
            fadeSpeed:"400",
            animation: false,
            animationSpeed: 2000,
            repeat: true,
            repeatInterval: 10,
            randomSize: true,
            linerAnimation: true,
            linerAnimationSpeed: 1000
        }, options );

        function getRandomInt(min, max) {
            return Math.floor(Math.random() * (max - min + 1)) + min;
        }

        function shuffle(array) {
            var currentIndex = array.length, temporaryValue, randomIndex;
            while (0 !== currentIndex) {
                randomIndex = Math.floor(Math.random() * currentIndex);
                currentIndex -= 1;
                temporaryValue = array[currentIndex];
                array[currentIndex] = array[randomIndex];
                array[randomIndex] = temporaryValue;
            }
            return array;
        }

        function random(container, just) {
            just = just || false;
            var existingCords = [];

            var blockWidth = $(container).width();
            var blockHeight = $(container).height();
            var imgArray = shuffle($('img', container));

            imgArray.each(function() {
                if(settings.randomSize){
                    $(this).css("width", Math.floor(Math.random() * (400 - 60 + 1)) + 150)
                }
                var h = $(this).height();
                var w = $(this).width();
                var thisTop;
                var thisLeft;
                var attempts = 0;
                while (true) {
                    thisTop = getRandomInt(0, blockHeight - h);
                    thisLeft = getRandomInt(0, blockWidth - w);
                    var valid = true;
                    if (!just) {
                        for (var i in existingCords) {
                            if (!existingCords.hasOwnProperty(i)) continue;
                            var n = existingCords[i];
                            valid = valid && ((thisTop + h < n.top || thisTop > n.thisHeight) || ( thisLeft + w < n.left || thisLeft > n.thisWidth ));
                        }
                    }
                    if (valid) {
                        break;
                    }
                    ++attempts;
                    if (attempts == 10) {
                        break;
                    }
                }
                if (attempts == 10) {
                    random(container, true);
                    return false;
                }
                existingCords.push({top: thisTop, left: thisLeft, thisWidth: thisLeft + w, thisHeight: thisTop + h});
                if (settings.fade) {    
                    $(this).fadeOut(settings.fadeSpeed, function() {
                        $(this).css({
                            top: thisTop,
                            left: thisLeft
                        });             
                        $(this).fadeIn(settings.fadeSpeed);
                    });
                }else if(settings.linerAnimation){
                $(this).show();
                    $(this).stop(true,true).animate({
                        top: thisTop                        
                    }, settings.linerAnimationSpeed, function() {
                    $(this).stop(true,true).animate({
                        left: thisLeft
                    }, settings.linerAnimationSpeed);

                    });
                } else if(settings.animation){
                    $(this).show();
                    $(this).stop(true,true).animate({
                        top: thisTop,
                        left: thisLeft                      
                    }, settings.animationSpeed, function() {                
                    });
                }else {
                    $(this).css({
                        top: thisTop,
                        left: thisLeft
                    });

                    $(this).show();
                }

            });
        }

        return this.each(function() {
            var $this = this;
            if (settings.resize) {
                $(window).resize(function() {
                    random($this);
                });
            }
            if(settings.repeat){
                setInterval(function() {
                    random($this);                    
                }, settings.repeatInterval);
            }
            random($this);
        });
    }
}(jQuery));

And here's how I call the function:

$('.images_container').randomizer({
    resize: true,
    repeatInterval: 10000,
    animation: true
});