Hello, @Juliana,
Actually, the footer works fine on your site and there is no issue with it https://postimg.cc/CBzf8nh2 But if you want to change its behavior navigate to the Dashboard >> XSTORE >> Theme Options >> Footer >> Footer layout and disable the “Fixed Footer” option check the image: https://postimg.cc/TKt8sKxQ then check back to your site after clearing the browser cache.
Regards 8Themes Team.