Elements not showing

HI,

I got this weird problem. Some elements are not working, and because of that the whole website acts weirdly.
For example. On the homepage, there should be text on the left bottom corner. Scrolling down you see a small yellow button on theright. That one suddenly doesn’t work. scrolling more down there should be a content slider. That one doesnt show, only the arrows.

I tried the following things:
– deactivating all plugins;
– reinstall the theme via WordPress;
– reinstall the theme via FTP.

When you login and check the back-end of the pages you’ll see all elements used and configured corrently. I’ve checked the error logs. Please see private content.

I hope you can help me.

Yours Faithfully,
Gillian.