full size image problems

Hi guys
I have a few errors i can’t figure out

I’m using supreme directory and all plugins are upto date
When im logged in at https://familyfun.site i have the following error in my concole :
Uncaught ReferenceError: $ is not defined
It should be something to do with this
: // Look for the language in the meta tag instead
pageLanguage = $(‘head’).children(‘meta[http-equiv=Content-Language]’).attr(“content”);
if(!pageLanguage) {
pageLanguage = “en”; // Default language

if im not logged in i have another error , actually three
Uncaught TypeError: c is not a constructor
Uncaught ReferenceError: $ is not defined

And when im on the frontpage the frontpage image does not cover the whole frontpage , this only happens when im not logged in, if im logged in it works .

Any idea to how i can fix these errors ?

Thanks in advance .

christian