Theme not showing - Cache issues? Please help

I just noticed that some of my pages are not showing up properly. I have toggles and tabs as you can see towards the bottom of the page. but when I click the tabs it just goes to the top of the page and the toggles are all open and empty =/

I know it worked a few days ago, so I am not sure what could have caused it.
One example URL is

I read somewhere to empty my cache and then I noticed that usually each time I had installed a new plugin, it would ask me empty the cache when I was in a post or page editing it, but now I can't get it to show up.

I have w3 cache and I clicked on "Empty all caches" but it's still not changing anything.

Please help. I am very frustrated. :slight_frown:
How can I check what causes it? Do you know what could be causing it?

It is very important to me to get it to work properly again as soon as possible