Issue with making apppointment (both desktop and mobile)

I have gotten the plugin setup on my WordPress. When I test it through the admin calendar, it allows me to make appointments and gives me the confirmation. However, when I go through the site like a customer would, nothing works. I can press the schedule appointment button, the little calendar pops up, but it only selects a service and not a date. Then when I press the next button it gives me the loading bar and nothing else. The calendar disappears from the screen and that’s it.

Any help would be greatly appreciated.

https://www.ads-software.com/plugins/appointment-calendar/