Nieprawidłowy korpus odpowiedzi JSON
// 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
Himanshu Jangid