在gadgets.io.MethodType.PUT中获取错误，获取错误由于输入结束，没有内容要映射到Object

Question

我收到错误没有内容要映射到Object，因为输入结束为什么我不知道

var data2={description:"from micro app"};

//var json_upload = JSON.stringify({name:"RoleByAnil55", securityDomain:{"id": "domin000000000000001","name": "world"}});
var json_upload=JSON.stringify(data2);

var parameters = {};
parameters[gadgets.io.RequestParameters.HEADERS] = {"Content-Type" : "application/json","sabacertificate" :apiCertificate};
parameters[gadgets.io.RequestParameters.METHOD]= gadgets.io.MethodType.PUT;

parameters[gadgets.io.RequestParameters.POST_DATA] = json_upload);
gadgets.io.makeRequest("https://qadb-api.xyz.com/v1/role/roles000000000001946", callback, parameters);

function callback(obj) {
    alert(obj.text);
};
return 0;