javascript error

Hello,

The Previous and Next buttons don’t work. They send me to the top of the page.

I get the following error:

[Error] TypeError: undefined is not a function (evaluating '$thumbs.isotope')
	(anonymous function) (js_composer_front.js, line 299)
	each (jquery.js, line 2)
	each (jquery.js, line 2)
	vc_teaserGrid (js_composer_front.js, line 295)
	vc_js (js_composer_front.js, line 24)
	(anonymous function) (js_composer_front.js, line 36)
	j (jquery.js, line 2)
	fireWith (jquery.js, line 2)
	ready (jquery.js, line 2)
	J (jquery.js, line 2)

This is using WordPress 4.0

~Ben

https://wordpress.org/plugins/easy-logo-slider/