5xx Server error responses

506Variant Also Negotiates

Circular reference detected

#When does this occur?

Returned when the server has an internal configuration error causing content negotiation to result in a circular reference.

#How to handle?

Server configuration error. Contact the server administrator.

#Example

HTTP Response

HTTP/1.1 506 Variant Also Negotiates
Content-Type: application/json
Date: Tue, 10 Feb 2026 07:18:52 GMT

{
  "status": 506,
  "message": "Variant Also Negotiates"
}

#Related Status Codes

500Internal Server Error 501Not Implemented 502Bad Gateway 503Service Unavailable 504Gateway Timeout

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