Problem with slider! Please Help.

Hello, i’m new to wordpress and i have set up a website.
I’m using Theme Travelify . The problem is till 2 or 3 days the slider worked perfectly changing the slides at correct intervals. But after i added a third slide it stopped doing so. I think i changed the slider settings. Under customizer of that theme, there is an option called featured slider.. in it there is an option called slider options, under which my settings are as follows: Transition-effect: wipe. Transition-delay(in seconds):2 Transitio-length(in seconds): 3… Please help me with the problem. The function of the slider is that it shows the featured posts.
My website- http://iconic-goa.pixub.com/

Any help would be most appreciated.