Hello, Krzysztof,
Thank you for contacting us and for using XStore.
We would recommend you use only the new element called Slides rather than the old Slider element (because it was built from stretch and was written with most optimization code techniques at this moment)
Anyway below is a list of files required for the correct work of those widgets:
1/ For correct work of the Slider element
http://yourwebsite.com/wp-content/themes/xstore/js/modules/swiper.min.js
http://yourwebsite.com/wp-content/themes/xstore/js/modules/swiperInit.min.js
http://yourwebsite.com/wp-content/themes/xstore/css/modules/builders/et-slider.min.css (if CSS minification option is active → https://prnt.sc/FBnBGGkCnljm ) or http://yourwebsite.com/wp-content/themes/xstore/css/modules/builders/et-slider.css ( if CSS minification option is inactive)
2/ For correct work of Slides element
http://yourwebsite.com/wp-content/themes/xstore/js/modules/ethemeElementorSlider.min.js
http://yourwebsite.com/wp-content/themes/xstore/css/modules/builders/elementor/etheme-slides.min.css (if CSS minification option is active → https://prnt.sc/FBnBGGkCnljm ) or
http://yourwebsite.com/wp-content/themes/xstore/css/modules/builders/elementor/etheme-slides.css ( if CSS minification option is inactive)
We hope this information is helpful.
Kind Regards,
8theme team