Home page doesn't load on mobile view.

Theme homepage does not load on mobile view and give the following error on browser console.

vendors.js?ver=20151215:38 Uncaught TypeError: Cannot read property 'clone' of undefined
    at e.run (vendors.js?ver=20151215:38)
    at Object.d [as run] (jquery.js?ver=1.12.4:2)
    at e.update (vendors.js?ver=20151215:38)
    at e.refresh (vendors.js?ver=20151215:38)
    at e.initialize (vendors.js?ver=20151215:38)
    at new e (vendors.js?ver=20151215:38)
    at HTMLDivElement.<anonymous> (vendors.js?ver=20151215:38)
    at Function.each (jquery.js?ver=1.12.4:2)
    at a.fn.init.each (jquery.js?ver=1.12.4:2)
    at a.fn.init.a.fn.owlCarousel (vendors.js?ver=20151215:38)

why this happens and how to fix it?
thank you