老师我这个请求怎么报错了

const url='https://cgi.urlsec.qq.com/index.php?icp=&certificate_pics=&isAdmin=false&phone=18355455459&a=addItem&src=3&smscode=781361&reason=dasdasda&m=urlComplain&url=749k.cn';

//const url='https://www.imooc.com/api/http/search/suggest?words=js/'

const xhr=new XMLHttpRequest();

xhr.onreadystatechange=()=>{

if(xhr.readyState!=4) return;

if((xhr.status>=200&&xhr.status<300)||xhr.status===304){

console.log(xhr.responseText);

}

}

xhr.open('GET',url,true);

xhr.send(null);