cordova路径必须是字符串，收到未定义

Question

“离子科尔多瓦准备”

  

科尔多瓦准备   ✖运行命令-失败！   [ERROR]运行cordova prepare（退出代码1）时发生错误：

    path.js:28
         throw new TypeError('Path must be a string. Received ' + 
    inspect(path));
         ^

    TypeError: Path must be a string. Received undefined
         at assertPath (path.js:28:11)
         at Object.join (path.js:1236:7)
         at Object.<anonymous> 
    (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/util.js:36:31)
         at Module._compile (module.js:653:30)
         at Object.Module._extensions..js (module.js:664:10)
         at Module.load (module.js:566:32)
         at tryModuleLoad (module.js:506:12)
         at Function.Module._load (module.js:498:3)
         at Module.require (module.js:597:17)
         at require (internal/module.js:11:18)

我是离子领域的新人