Los códigos de clase 5XX indican que el servidor tiene un problema con la solicitud.
Error HTTP 500 Internal Server Error
Error HTTP 501 Not Implemented
Error HTTP 502 Bad Gateway
Error HTTP 503 Service Unavailable
Error HTTP 504 Gateway Timeout
Error HTTP 505 HTTP Version Not Supported
Error HTTP 506 Variant Also Negotiates
Error HTTP 507 Insufficient Storage
Error HTTP 508 Loop Detected
Error HTTP 510 Not Extended
Error HTTP 511 Network Authentication Required
Error HTTP 520 Web Server Is Returning an Unknown Error
Error HTTP 521 Web Server Is Down
Error HTTP 522 Connection Timed Out
Error HTTP 523 Origin Is Unreachable
Error HTTP 524 A Timeout Occurred
Error HTTP 525 SSL Handshake Failed
Error HTTP 526 Invalid SSL Certificate
Error HTTP 527 Railgun Error
Error HTTP 561 Unauthorized
Error HTTP 598 Network Read Timeout Error