Quality is delighting customers
Looks like some server error.
Can you check with Fiddler as well.
Install Fiddler, capture what you're sending through browser, and through JMeter, compare.
Is possible can you share complete response code?
HTTP Error 400. The request has an invalid header name.
1) invalid_request - The request is malformed, a required parameter is missing or a parameter has an invalid value
2) invalid_client - Client authentication faile
3) unauthorized_client - Client is not authorized to use the grant
You mean to say that this error is because of request missed the information
HTTP Status code 400 means Bad Request, most likely you sent something syntactically incorrect.
See Testing SOAP/REST Web Services Using JMeter article to get started with web services load testing