Identify the HTTP status codes that represents the server error.

HTTP status codes are categorized into fiveclasses, where each class is represented by the first digit of the status code. The 5XX series of status codes indicates server errors, which means that the server is aware that it has encountered an error or is otherwise incapable of performing the request. Common examples of 5XX status codes include 500 (Internal Server Error), 501 (Not Implemented), 502 (Bad Gateway), etc. These indicate that the request was valid, but the server failed to fulfill the request due to some issue on the server side.