UnityWebGL获取网页地址中的Token值

与网页端具体的交互参考我的例外一篇博客：传送门
Unity与浏览器交互的官方地址

Unity版本：Unity2021.2.15f1

.jslib的代码内容:

mergeInto(LibraryManager.library, {
    GetToken: function () {
        var url = window.location.href;

        var temp = url.split('?')[1];
        var pram = new URLSearchParams('?' + temp);
        var tookenStr = pram.get('token');

        var bufferSize = lengthBytesUTF8(tookenStr) + 1;
        var buffer = _malloc(bufferSize);
        stringToUTF8(tookenStr, buffer, bufferSize);
        return buffer;
    },
});

注意：代码中添加注释会打包报错，打包的文件夹会缺少文件，具体是什么原因，我也不清楚。
报错内容：Building Library\Bee\artifacts\WebGL\build\debug_WebGL_wasm\build.js failed with output:

C#代码

using System.Runtime.InteropServices;
using UnityEngine;

public class NewBehaviourScript : MonoBehaviour
{
    [DllImport("__Internal")]
    private static extern string GetToken();
    
    void Start()
    {
        string str = GetToken();
        Debug.Log("unity得到的token值: " + str);
    }

}