(index):409 Uncaught TypeError: jQuery is not a function

I have a slider plugin called “wp featured content slider” and I added the code for my class schedule for my gym from “hq front desk”. The slider disappears when I add the class shedule. I inspected my code and i see that it says “(index):409 Uncaught TypeError: jQuery is not a function” Help?! Here is the page: https://sthelenafitness.com/classes/#/today