505 HTTP Version Not Supported

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This error response indicates the server does not support HTTP version used in the client request.

Usually this is due to an outdated browser or a recent update to the server. This issue can also affect bots and other HTTP based client applications. In some cases this can also occur if the the server is outdated and requires an HTTP version that is no longer supported.

The first step in troubleshooting is to confirm the client version and update if necessary. Testing with an alternate client can help resolve or find compatibility issues.

If the error persists then contact server support for help.

The HyperText Transfer Protocol (HTTP) 505 HTTP Version Not Supported response status code indicates that the HTTP version used in the request is not supported by the server.


505 HTTP Version Not Supported


RFC 7231, section 6.6.6: 505 HTTP Version Not SupportedHypertext Transfer Protocol (HTTP/1.1): Semantics and Content