Useless Horizontal scroll bar does not disappear

I am working on this website right now:

And as you can see there is a useless horizontal scrollbar that is not possible to use. And as my website does not need horizontal scrolling I am wondering how to get this away. Any ideas?

Thank you!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

If you have that issue, it means part of your website design is out of bounds, you can fix it by changing your wrapper element that wraps the content of your page( I use a div block with a class “main-wrapper” to put all the contents of my website page in but everyone does this differently) to overflow:hidden

you could also look for the element that’s causing the overflow and try to adjust it but the overflow:hidden is a quick fix