'Not Found' is not an option

The code 404, as you may already know, corresponds to "File Not Found", and is probably the most famous of all the status codes defined in the Hypertext Transfer Protocol (HTTP) specification. These codes correspond to different responses users can receive when they request a document from a Web server. In this case, whenever a file can't be accessed by a user, the Web server will generate a 404 error.

Since the default mechanisms can't provide any relevant information to our visitors, showing customized error messages is essential.

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