title: How to resolve these errors form updated Node & npm versions ..?
body: <p>I update the Node latest version to 15.0.1 &amp; npm 7.0.3. After i installed node modules and run my project with npm start its showing these type of errors....</p>
  <blockquote>
  <p>cross-env NODE_ENV=development webpack-dev-server --open --config webpack.dev.js</p>
  </blockquote>
  <p>node:events:304
  throw er; // Unhandled 'error' event
  ^</p>
  <p>Error: spawn webpack-dev-server ENOENT
  at Process.ChildProcess._handle.onexit (node:internal/child_process:269:19)
  at onErrorNT (node:internal/child_process:465:16)
  at processTicksAndRejections (node:internal/process/task_queues:80:21)
  Emitted 'error' event on ChildProcess instance at:
  at Process.ChildProcess._handle.onexit (node:internal/child_process:275:12)
  at onErrorNT (node:internal/child_process:465:16)
  at processTicksAndRejections (node:internal/process/task_queues:80:21) {
  errno: -2,
  code: 'ENOENT',
  syscall: 'spawn webpack-dev-server',
  path: 'webpack-dev-server',
  spawnargs: [ '--open', '--config', 'webpack.dev.js' ]
  }
  npm ERR! code 1
  npm ERR! command failed
  npm ERR! command sh -c cross-env NODE_ENV=development webpack-dev-server --open --config webpack.dev.js</p>
  <p>npm ERR! A complete log of this run can be found in:
  npm ERR!     /home/krishnasai/.npm/_logs/2020-10-28T09_44_19_855Z-debug.log</p>