When I type the URL its works fine but once I click to redirect to another page the error 404 appears. I checked many times if there was a mistake on the URL but its correct. I tried writing by myself and I get correctly to the page.
Also, note that URLs always use forward slashes, not backslashes. Backslashes for directories are only used on Windows systems. MacOS and Linux (which most hosting providers, including ourselves, use) use forward slashes for directories on the system as well.