JAVASCRIPT

invalid json response body at

// You json is probably worng
// Check if you have written json in a proper format
// sample

{
	"name": "Himanshu",
    "github_username": "himanshurajora",
    "numbers": [12, 12, 14]
}

// no commas at the end
// keys in quotes (only for http requests) otherwise you can use without quotes

invalid json response body

Copy the JSON, go to https://jsonlint.com/, paste into the window, you will see where the malformed JSON lies.