issue with testimonials slider plugin

Hi there,

I’ve an issue with testimonials slider plugin from past to days.from past two days i didn’t do any major changes to functionality or jquery of site.
this is the live site https://elhappycoach.com/ where slider is not working.if you check my developement site https://dev.gopinathpara.info/mth/ .. i tried to transfer the the plugin folder from dev domain to live domain but no use.

another thing is when i saw the source code with inspect element ,i can see the slider code in https://elhappycoach.com/.
the site has jquery update plugin also.so anybuddy please help me in solving this.

Thanks
Gopi
https://www.ads-software.com/plugins/testimonial-rotator/