

This category contrasts with 5xx classification errors, such as the 504 Gateway Timeout Error we explored a few months ago, which are considered server error responses. Let’s dive in! Server- or Client-Side?Īll HTTP response status codes that are in the 4xx category are considered client error responses. We’ll even examine a number of the most popular content management systems ( CMSs) for potential problem areas that could cause your own website to be generating a 406 Not Acceptable unexpectedly. In this article we’ll examine the 406 Not Acceptable in more detail by looking at what might cause a message, along with a handful of tips for diagnosing and debugging the appearance of this error within your own application.
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With a potential pool of over 50 status codes that represent the complex relationship between the client, a web application, a web server, and often multiple third-party web services, determining the cause of a particular status code can be a challenge under the best of circumstances. Like most HTTP response codes - especially for those that indicate an error - the cause of a 406 Not Acceptable error code can be difficult to track down and fix. browser) specifying an acceptable character set (via Accept-Charset), language (via Accept-Language), and so forth that should be responded with, and the server being unable to provide such a response. This is typically a result of the user agent (i.e. The 406 Not Acceptable is an HTTP response status code indicating that the client has requested a response using Accept- headers that the server is unable to fulfill.
