Buttons don't link (leads to "page not found")

I copied the home page and tried to link from the homepage to that copy. For some reason I am unable to connect those pro pages. It shows “page not found”. Any thoughts on how to resolve this?

Sharable link:
Webflow - Norman Hiob

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

For some reason the Imprint text link on the bottom of the page works, but when I replace a button with a copy if the Imprint text link, it says page not found.