pi@raspberrypi:~/MagicMirror $ npm start

magicmirror@2.0.0 start /home/pi/MagicMirror
electron js/electron.js

fs.js:640
return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
^

Error: ENOENT: no such file or directory, open ‘/home/pi/MagicMirror/node_modules/electron/path.txt’
at Error (native)
at Object.fs.openSync (fs.js:640:18)
at Object.fs.readFileSync (fs.js:508:33)
at Object. (/home/pi/MagicMirror/node_modules/electron/index.js:4:42)
at Module._compile (module.js:570:32)
at Object.Module._extensions…js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)

npm ERR! Linux 4.4.21-v7+
npm ERR! argv “/usr/local/bin/node” “/usr/local/bin/npm” “start”
npm ERR! node v6.9.1
npm ERR! npm v3.10.8
npm ERR! code ELIFECYCLE
npm ERR! magicmirror@2.0.0 start: electron js/electron.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the magicmirror@2.0.0 start script ‘electron js/electron.js’.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the magicmirror package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! electron js/electron.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs magicmirror
npm ERR! Or if that isn’t available, you can get their info via:
npm ERR! npm owner ls magicmirror
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /home/pi/MagicMirror/npm-debug.log

how can i fix this?