[]加载unity导出场景失败

代码：

Laya.init(600, 400);

var scene=Laya.Scene.load("main/SMain.ls");

Laya.stage.addChild(scene);
  
错误信息：
Warning!,this class[MiniAdpter] already exist: Object
Error: LoaderManager:unknown file(E:/LayaAir/ZJKZWDT/bin/main/SMain.ls) extension with: ls.
    at LoaderManager.__proto._create (file:///E:/LayaAir/ZJKZWDT/bin/libs/laya.core.js:12981:11)
    at LoaderManager.__proto.create (file:///E:/LayaAir/ZJKZWDT/bin/libs/laya.core.js:12969:21)
    at Function.Scene.load (file:///E:/LayaAir/ZJKZWDT/bin/libs/laya.d3.js:29591:22)
    at file:///E:/LayaAir/ZJKZWDT/src/LayaSample.js:5:22