php sdk Uncaught exception ‘RuntimeException’ with message 'CURL connection (/1.1/batch) error: 3 <url> malformed’

window phpStudy 2017 手动下载sdk
测试代码

<?php
require_once("sdk/src/autoload.php");

// 参数依次为 app-id, app-key, master-key

use \LeanCloud\Client;
use \LeanCloud\Object;

use LeanCloud\CloudException;
// 参数依次为 AppId, AppKey, MasterKey
Client::initialize("anAppIdGzoHsz", "8bAppKey9IA", "UPMasterKeyGq");

$obj = new Object("TestObject");
$obj->set("name", "alice");
$obj->set("height", 60.0);
$obj->set("weight", 4.5);

try {
$obj->save();
} catch (CloudException $ex) {
// CloudException 会被抛出，如果保存失败
}

?>
Uncaught exception 'RuntimeException' with message 'CURL connection (/1.1/batch) error: 3 malformed'

请问怎么解决啊？