Well after analyzing your dope, I noted the following:
You are using w3total cache plugin, and JS minification is active, normally, caching is activated once your website is fully completed. w3total, because of the activated feature, minified all js into one single file and ignores any other js calls by other plugins, that’s the reason, even switching themes didn’t work, w3total now redirect all js calls to a single minfied js library, so all calls needed by any other plugins, most of them are ones installed after the activation of these settings, are redirected to the minified js which doesn’t find the needed script, so it will never work on whatsoever theme you select.
Additionally, the minified JS file in wp-content/w3tc/min/804750a4.5ddcaa.js.
Note, the /min/ referring to MINified and the file 804…….js is your minified javascript file, this file got an error in it, an uncaught reference error:gallery in not defined.
Consequently, the first thing you would do, is to disable all caching techniques by w3total, and once your are done with your website, enable it again. After you do, consider implementing the steps mentioned above.
After disabling caching and retrying what was mentioned above, we can start diagnosing properly.
Regards.
