title: Cannot run npm run serve
body: <p>I created a client project for vue and run npm run serve,
  but got this error:</p>
  
  <p>Tried to reinstall node,npm, edited some PATHS, but nothing worked</p>
  
  <h3>Version</h3>
  
  <p>3.2.1</p>
  
  <h3>Node and OS info</h3>
  
  <p>Node v10.14.0/ npm 6.4.1</p>
  
  <pre><code>    0 info it worked if it ends with ok
      1 verbose cli [ '/usr/local/bin/node', '/usr/local/bin/npm', 'run', 'serve' ]
      2 info using npm@6.4.1
      3 info using node@v10.14.0
      4 verbose run-script [ 'preserve', 'serve', 'postserve' ]
      5 info lifecycle client@0.1.0~preserve: client@0.1.0
      6 info lifecycle client@0.1.0~serve: client@0.1.0
      7 verbose lifecycle client@0.1.0~serve: unsafe-perm in lifecycle true
      8 verbose lifecycle client@0.1.0~serve: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/alexsexotic/Desktop/work/Test - mongod:node/client/node_modules/.bin:/Library/Frameworks/Python.framework/Versions/3.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Frameworks/Python.framework/Versions/3.7/bin:/Users/alexsexotic/.npm-global/bin
      9 verbose lifecycle client@0.1.0~serve: CWD: /Users/alexsexotic/Desktop/work/Test - mongod:node/client
      10 silly lifecycle client@0.1.0~serve: Args: [ '-c', 'vue-cli-service serve' ]
      11 info lifecycle client@0.1.0~serve: Failed to exec serve script
      12 verbose stack Error: client@0.1.0 serve: `vue-cli-service serve`
      12 verbose stack spawn ENOENT
      12 verbose stack     at ChildProcess.&lt;anonymous&gt; (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:48:18)
      12 verbose stack     at ChildProcess.emit (events.js:182:13)
      12 verbose stack     at maybeClose (internal/child_process.js:962:16)
      12 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:251:5)
      13 verbose pkgid client@0.1.0
      14 verbose cwd /Users/alexsexotic/Desktop/work/Test - mongod:node/client
      15 verbose Darwin 17.2.0
      16 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "serve"
      17 verbose node v10.14.0
      18 verbose npm  v6.4.1
      19 error file sh
      20 error code ELIFECYCLE
      21 error errno ENOENT
      22 error syscall spawn
      23 error client@0.1.0 serve: `vue-cli-service serve`
      23 error spawn ENOENT
      24 error Failed at the client@0.1.0 serve script.
      24 error This is probably not a problem with npm. There is likely additional logging output above.
      25 verbose exit [ 1, true ]
  </code></pre>