Error code 404, see explanation in table below.

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302 - Redirect
400 - Bad Request
401 - Authorization Required
402 - Payment Required
403 - Forbidden
404 - File Not Found
405 - Method Not Allowed
406 - Not Acceptable
407 - Proxy Authentication Required
408 - Request Time-out
409 - Conflict
410 - Gone
411 - Length Required
412 - Precondition Failed
413 - Request Entity Too Large
414 - Request-URI Too Large
415 - Unsupported Media Type
500 - Internal Server Error
501 - Method Not Implemented
502 - Bad Gateway
503 - Service Temporarily Unavailable
504 - Gateway Time-out
505 - HTTP Version Not Supported

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Apache Server 2021