Menu every time different on different pages

Hi,
I need support.
I installed the menu. I customized it with colors and the demo.
Now it is no longer consistent on my site, but some pages are different every time.
Also when I reset it, it stays that way.

I have checked my https. That’s OK.

How do I get the menu consistent on every page the way I want it?
the problem is with different browsers.

Mijn website: https://tango.danceworld.online/

The page I need help with: [log in to see the link]