What is a 404 error?

A "404 Not Found Error" refers to an "HTTP response status code" indicating that the location or URL of the request could not be found.

With a 404 status code, it can sometimes be difficult to find and solve the cause. This is because many factors can play a role in the cause of a 404 status code.

Client side or server side?

The status code 400 in question falls into the category for "client error responses", or error messages that may occur on the end user's side. Since the requested location cannot be found with a 404 status code, the problem can almost always be attributed to the requester. This is because a non-existent url or location is requested.

Cause

The cause of a 404 status code can be one of the following:

The requestor has made a request to a location or url that does not exist on the server. This prevents the server from returning a result.

It can happen that a 404 status code is given from a website, while the actual http response status code is indeed a 200 OK status code. This often happens when you have your own 404 pages in use and you capture this status code in the website yourself.

A request can be made from a website for possibly required files. If these files are not present on the server, a 404 status code will also be returned for these requests.

Dissolve

You can solve a 404 status code by checking a number of points:

Check whether the url / location used for the request is valid. You can check this by checking whether there are no typing errors in the url / location or whether the search is done via the correct domain.

If a CMS is used and a page cannot be found, it may be useful to check whether this page has been created properly. It is also possible that the page has been created, but with the wrong link as the location.

In the case of requests for potentially necessary files from a website that cannot be fulfilled, it is useful to check whether these files are present on the server.