hello? i purchased HEWO wordpress theme, here is my website http://thelincolnstar.news/

why i am not getting images on slider bar?

i can see this image on post : https://secureservercdn.net/104.238.71.109/8m3.d73.myftpupload.com/wp-content/uploads/2020/05/schoollogo.jpg?time=1589369561 

but on slide bar