Multiple problems

For some reason this plugin gives me multiple errors: When I click a few times on the arrow slider stops and can not be used; and also many of the “vignettes”, when pressed, no redirects me to the corresponding link, it only when the vignette came out great. What could be the reason?

https://wordpress.org/plugins/infinite-slider/