Cannot find module '/Applications/Appium 2.app/Contents/Resources/node_modules/appium/bin/appium-doctor.js' shown when i run appium doctor

‘/Applications/Appium 2.app/Contents/Resources/node/bin/node’ ‘/Applications/Appium 2.app/Contents/Resources/node_modules/appium/bin/appium-doctor.js’
module.js:341
throw err;
^

Error: Cannot find module ‘/Applications/Appium 2.app/Contents/Resources/node_modules/appium/bin/appium-doctor.js’
at Function.Module._resolveFilename (module.js:339:15)
at Function.Module._load (module.js:290:25)
at Function.Module.runMain (module.js:447:10)
at startup (node.js:146:18)
at node.js:404:3