Magento 2 TypeError Undefined products images not displaying / js not loading

Question

At home page, product category view and product detailed view page images are not loading / displaying at firefox and less frequently at chrome.

I am using magento 2.2.6 upgraded from 2.2.2 and porto theme upgrade to 3.1.5.

Inspect shows after clean cache:

1.- TypeError: src is undefined

2.- TypeError: $.ui is undefined

3.- TypeError: $.widget is not a function

4.- TypeError: $.widget is not a function (twice)

5.- TypeError: $.ui is undefined

Inspect shows after reload home page a few less:

1.- TypeError: src is undefined

2.- TypeError: $.ui is undefined

3.- TypeError: $.ui is undefined

exception.log shows from 2 days ago (not today):

[2018-09-26 16:02:26] main.CRITICAL: Cannot gather stats! Warning!stat(): stat failed for /home/xxx/public_html/pub/static/frontend/Smartwave/porto/es_AR/mage/requirejs/mixins.js {"exception":"[object] (Magento\Framework\Exception\FileSystemException(code: 0): Cannot gather stats! Warning!stat(): stat failed for /home/xxx/public_html/pub/static/frontend/Smartwave/porto/es_AR/mage/requirejs/mixins.js at /home/xxx/public_html/vendor/magento/framework/Filesystem/Driver/File.php:71)"} []

any help will be great !

my site: https://www.calzadosyoyito.cl

Answer 1

After many cigarretes and heart attacks, I found what was trouble all my javascript stuff, It was a scripts that seems to call their own js as reported by another guy whom I lost their link :(, but I remembered. My script was provided by McAfee :

script type="text/javascript" src="https://cdn.ywxi.net/js/1.js" async> /script

So I deleted and voila !!! :)

Cheers !