What’s the URL? I know this may sound silly, but are you running Adblock?
Was having the exact same issue a few weeks back with one of the websites I manage. Namely this one https://www.billigeforbruksl?n.no.
I disabled all the plugings, emptied the cache, checked the right boxes and went over the jquery codes. Yet nothing worked.
Then I finally remembered my adblock…and voilá.
And if you haven’t done this already, try loading the page in incognito mode to see if it works. Adblock (and some other exterior browser plugins, which you should also disable) are known to interfere with jquery.
