Hello,
After I looked into Theme Settings -> Performance -> Plugins I found that the issue with the slider resulted from the incorrectly enabled options for the Elementor.
https://monosnap.com/file/iuvJNJhtuxSJZjnRa6JmnAXZJUVEha
Check the above screenshot and disable all options which are highlighted by a red square. After that enable the “Elementor frontend” option for activating the work of the slider because you are using the Elementor’s slider which is use their own JS scrips.
https://gyazo.com/d2f36ceca564bb3fc7bd4e5bdec9dad4
Don’t hesitate to let me know if you need any further help or any other info.
Kind Regards