Angular zone.js和shim.min.js错误

Question

我已下载角度快速启动代码并在我的机器中进行设置但是当我运行命令npm start时它会给我以下错误：

Uncaught Error: Zone already loaded.
    at zone.js:32
    at zone.js:643
    at FUNCTION (zone.js:11)
    at zone.js:12

Unhandled promise rejection TypeError: Zone.assertZonePatched is not a function
    at new NgZone (core.umd.js:3807)
    at PlatformRef_._bootstrapModuleFactoryWithZone (core.umd.js:4524)
    at eval (core.umd.js:4569)
    at shim.min.js:8
    at shim.min.js:8
    at MutationObserver.s (shim.min.js:7)
    at Zone.run (angular2-polyfills.js:138)
    at MutationObserver.zoneBoundFn (angular2-polyfills.js:111)

我使用节点版本6.11.3和npm版本作为3.10.10。那么有人可以帮我吗？