this.sliderElement.on is not a function

JavaScript error
this.sliderElement.on is not a function

Cause
There is some old jQuery called in in your website by an outdated code, which is conflicting with new jQuery. Right click on your website, choose "View page source", search for "jquery", and you will probably see some older version, and look at before and after this javascript file incalling, what do you have around that part of your website's source and that could point you to a plugin, that is calling it in. Or just try to disable your plugins.