Error 404--Not FoundFrom RFC 2068 Hypertext Transfer Protocol -- HTTP111045 404 Not FoundThe server has not found anything matching the Request-URI No indication is given of whether the condition is t

In simpler terms, when you see the error message "Error 404--Not Found," it means that the server could not find the requested webpage or resource. This could be because the URL (Request-URI) is incorrect or the resource no longer exists.

The server does not provide any information about whether this is a temporary or permanent condition. If the server does not want to reveal the reason for the error, it may use the status code 403 (Forbidden) instead.

If the server knows that the requested resource is permanently unavailable and has no forwarding address, it should use the status code 410 (Gone). This status code is typically used when a resource has been intentionally removed and will not be available again in the future