title: Getting error on npm install as npm ERR cb() never called
body: <p>I have set a proxy in npm global config. On installing any package I am getting following error. 
  Below is my node and npm version:
  npm: 6.13.4
  node: v12.16.1</p>
  
  <p>As I am behind proxy, what else is required to overcome this issue. Every help will be appreciated.
  I have also tried by updating node version, removing and after restart setting proxy again, but none of that worked.</p>
  
  <pre><code>    C:\test&gt;npm i level-db-helper
      npm ERR! cb() never called!
  
      npm ERR! This is an error with npm itself. Please report this error at:
      npm ERR!     &lt;https://npm.community&gt;
  
      npm ERR! A complete log of this run can be found in:
      npm ERR!     C:\Users\user\AppData\Roaming\npm-cache\_logs\2020-03-03T04_51_02_995Z-debug.log
  
      C:\test&gt;npm get proxy
      http://my-proxy.com:8080
  
      C:\test&gt;npm get https-proxy
      http://my-proxy.com:8080
  
      C:\test&gt;
  </code></pre>
  
  <p>Below is my log file content</p>
  
  <pre><code>0 info it worked if it ends with ok
  1 verbose cli [
  1 verbose cli   'C:\\Program Files\\nodejs\\node.exe',
  1 verbose cli   'C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
  1 verbose cli   'i',
  1 verbose cli   'level-db-helper'
  1 verbose cli ]
  2 info using npm@6.13.4
  3 info using node@v12.16.1
  4 verbose npm-session b2d05546852e6399
  5 silly install loadCurrentTree
  6 silly install readLocalPackageData
  7 timing npm Completed in 3615ms
  8 error cb() never called!
  9 error This is an error with npm itself. Please report this error at:
  10 error &lt;https://npm.community&gt;
  </code></pre>