None working template: Intelligible Business 20-in-1 WP Theme

I need help with the template I purchased, Intelligible Business 20-in-1 WP Theme. When I tried to edit text on the home page’s slider it does’t show or save the changes. I have followed the instruction but it is just not working. Does anyone have the same problem or knows how to fix this problem?

Thanks,

You really need to contact the author-they are the best bet to get it sorted. Good luck