failed to read contents of npm cache

[Themessager]

Description

Error: ! failed to read contents of npm cache
    at ChildProcess.onClose (/Users/.../.../.../.../.../node_modules/shrinkpack/src/analyse/read-npm-cache.js:40:25)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:915:16)
    at Socket.stream.socket.on (internal/child_process.js:336:11)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at Pipe._handle.close [as _onclose] (net.js:561:12)

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! harmony@1.0.0 postshrinkwrap: shrinkpack && node ./bin/zipTarballs.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the harmony@1.0.0 postshrinkwrap script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

Suggested Solution

Help Needed