Parallax section missing

I’ve used one of your other themes (advertica) and it seemed to set up and work quite well. Invert appears to be a variation of the same theme but for a couple of things:

• The parallax section doesn’t appear
• Header resize when scrolling is very flaky and jumps all over the place

Here’s the site though it will probably change fairly quickly:
https://bangsalon.x10host.com/