Upfront editor unusable, page not showing images added - SITE DOWN

Upfront problem. On my front home page for ussunnah.org the slider images are not showing. When I open Upfront the image shows (very slowly) but half is hidden out of view. Clicking background edit and then "add slides" also makes everything blurry like the modal will show for media but it never does.. then Upfront Editor becomes unusable. Please fix this ASAP as my site is currently unusable and basically "down"... this is urgent. I have granted access to support.