Content not showing, theme bits not working

Hi, my customers site is implemented with your one page demo, Creative Studio (https://kriesi.at/themes/enfold-creative-studio/). It was all good when we launched the site few months ago, but right now nothing seems to work.
Everything looks fine in admin, but lot of content is not showing on the page…
Timeline is not showing at all, tabs are not working, and some bits of content are missing. The content is there in the code so I’m rather clueless.

What could have happened? I’ve created an admin account for you so you can check it out.

Also, the timeline bits never worked as they should on mobiles. I guess sections should be set to full width, no custom sizes. Don’t know if it’s because it is inside of a tab, but it never displayed as it should, it was always wider than the viewport.

Thanks,
Damir