Error : Failed to parse json for Electron Js

npm ERR! file D:\node\electron\package.json
npm ERR! code EJSONPARSE
npm ERR! Failed to parse json
 pm ERR! Unexpected token ? in JSON at position 0 while parsing near '??
npm ERR!  '
npm ERR! File: D:\test\node\electron\package.json
npm ERR! Failed to parse package.json data.
npm ERR! package.json must be actual JSON, not just JavaScript.
npm ERR!
npm ERR! Tell the package author to fix their package.json file. JSON.parse

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\AppData\Roaming\npm-cache\_logs\2017-11-12T01_20_56_
303Z-debug.log

npm cache clean