500 Internal Server Error

The HTTP 
500 Internal Server Error server error response status code indicates that the server encountered an unexpected condition that prevented it from fulfilling the request.
This error is a generic "catch-all" response to server issues, indicating that the server cannot find a more appropriate 5XX error to respond with.
If you're a visitor seeing 
500 errors on a web page, these issues require investigation by server owners or administrators.
There are many possible causes of 
500 errors, including: improper server configuration, out-of-memory (OOM) issues, unhandled exceptions, improper file permissions, or other complex factors.
Server administrators may proactively log occurrences of server error responses, like the 
500 status code, with details about the initiating requests to improve the stability of a service in the future.
Status
500 Internal Server Error
Examples
500 server error response
The following request tries to fetch a webpage, but receives a 500 response in return.
The response body contains a page describing the server state with a link to a support page for visitors.
An identifier is contained in the response body for illustration of a method that may help server administrators narrow down the root cause of the problem:
GET /highlights HTTP/1.1
Host: example.com
User-Agent: curl/8.6.0
Accept: */*
HTTP/1.1 500 Internal Server Error
Content-Type: text/html;
Content-Length: 123
<!doctype html>
<html lang="en">
<head>
  <title>500 Internal Server Error</title>
</head>
<body>
  <h1>Internal Server Error</h1>
  <p>The server was unable to complete your request. Please try again later.</p>
  <p>If this problem persists, please <a href="https://example.com/support">contact support</a>.</p>
  <p>Server logs contain details of this error with request ID: ABC-123.</p>
</body>
</html>
Specifications
See also
HTTP response status codes