HTTP 417 Expectation Failed Error

Main causes

Server doesn't support the expectations stated in the Expect header of the request.
Misconfiguration of the server leading to inability to meet the requirements specified in the Expect header.
Proxy or intermediary between the client and server that strips or alters headers, affecting the Expect header handling.
Client error in setting an unrealistic or unsupported expectation in the Expect header.

# Request example 
curl -X PUT https://sandbox.oxylabs.io/ -H 'Accept: */*;q=0.8' -H 'Accept-Encoding: compress' -H 'User-Agent: AppleWebKit/537.36'

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Shorten the URL by reducing the number of query parameters or the length of each parameter.
Convert the GET request to a POST request to handle larger amounts of data in the request body instead of the URL.
Check and modify server settings to increase the maximum allowable URL length.
Review and correct any redirection loops or misconfigurations causing excessive URL length.

# Response example 
HTTP/1.1 417 Expectation Failed
Content-Type: text/html; charset=UTF-8
Content-Length: 49

417 Expectation Failed

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From

401 Unauthorized	403 Forbidden	404 Not found	405 Method not allowed	406 Not acceptable
407 Proxy authentication required	408 Request timeout	409 Conflict	410 Gone	411 Length required
412 Precondition failed	413 Payload too large	414 Uri too long	415 Unsupported media type	416 Range not satisfiable
417 Expectation failed	421 Misdirected request	422 Unprocessable entity	423 Locked	424 Failed dependency
426 Upgrade required	428 Precondition required	429 Too many requests	431 Request header fields too large	444 Connection: close
451 Unavailable for legal reasons	499 Client closed request	501 Not implemented	503 Service unavailable	505 Http version not supported
506 Variant also negotiates	507 Insufficient storage	508 Loop detected	510 Not extended	511 Network authentication required