title: Elastic Beanstalk upload and deploy error: Error: Cannot find module 'semver'
body: <p>This is my first time uploading a Node.js/Express app to Elastic Beanstalk/AWS. The <code>server</code> folder uploaded fine. But on another environment, my <code>client</code> folder failed to load. </p>
  
  <pre><code>module.js:478
  throw err;
  ^
  
  Error: Cannot find module 'semver'
      at Function.Module._resolveFilename (module.js:476:15)
      at Function.Module._load (module.js:424:25)
      at Module.require (module.js:504:17)
      at require (internal/module.js:20:19)
      at Object.&lt;anonymous&gt; (/var/app/current/build/check-versions.js:2:14)
      at Module._compile (module.js:577:32)
      at Object.Module._extensions..js (module.js:586:10)
      at Module.load (module.js:494:32)
      at tryModuleLoad (module.js:453:12)
      at Function.Module._load (module.js:445:3)
  </code></pre>
  
  <p>I don't understand this error or the cause. Can anyone help? </p>
  
  <p>It prompts to reinstall/upgrade node, but I don't believe I can do so on AWS ...</p>
  
  <p>Full log:</p>
  
  <pre><code>-------------------------------------
  /var/log/nodejs/nodejs.log
  -------------------------------------
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the client@1.0.0 start script 'node build/build.js'.
  npm ERR! Make sure you have the latest version of node.js and npm installed.
  npm ERR! If you do, this is most likely a problem with the client package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     node build/build.js
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs client
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls client
  npm ERR! There is likely additional logging output above.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     /var/app/current/npm-debug.log
  
  &gt; client@1.0.0 start /var/app/current
  &gt; node build/build.js
  
  module.js:478
      throw err;
      ^
  
  Error: Cannot find module 'semver'
      at Function.Module._resolveFilename (module.js:476:15)
      at Function.Module._load (module.js:424:25)
      at Module.require (module.js:504:17)
      at require (internal/module.js:20:19)
      at Object.&lt;anonymous&gt; (/var/app/current/build/check-versions.js:2:14)
      at Module._compile (module.js:577:32)
      at Object.Module._extensions..js (module.js:586:10)
      at Module.load (module.js:494:32)
      at tryModuleLoad (module.js:453:12)
      at Function.Module._load (module.js:445:3)
  
  npm ERR! Linux 4.14.62-65.117.amzn1.x86_64
  npm ERR! argv "/opt/elasticbeanstalk/node-install/node-v6.14.3-linux-x64/bin/node" "/opt/elasticbeanstalk/node-install/node-v6.14.3-linux-x64/bin/npm" "start"
  npm ERR! node v6.14.3
  npm ERR! npm  v3.10.10
  npm ERR! code ELIFECYCLE
  npm ERR! client@1.0.0 start: `node build/build.js`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the client@1.0.0 start script 'node build/build.js'.
  npm ERR! Make sure you have the latest version of node.js and npm installed.
  npm ERR! If you do, this is most likely a problem with the client package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     node build/build.js
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs client
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls client
  npm ERR! There is likely additional logging output above.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     /var/app/current/npm-debug.log
  
  &gt; client@1.0.0 start /var/app/current
  &gt; node build/build.js
  
  module.js:478
      throw err;
      ^
  
  Error: Cannot find module 'semver'
      at Function.Module._resolveFilename (module.js:476:15)
      at Function.Module._load (module.js:424:25)
      at Module.require (module.js:504:17)
      at require (internal/module.js:20:19)
      at Object.&lt;anonymous&gt; (/var/app/current/build/check-versions.js:2:14)
      at Module._compile (module.js:577:32)
      at Object.Module._extensions..js (module.js:586:10)
      at Module.load (module.js:494:32)
      at tryModuleLoad (module.js:453:12)
      at Function.Module._load (module.js:445:3)
  
  npm ERR! Linux 4.14.62-65.117.amzn1.x86_64
  npm ERR! argv "/opt/elasticbeanstalk/node-install/node-v6.14.3-linux-x64/bin/node" "/opt/elasticbeanstalk/node-install/node-v6.14.3-linux-x64/bin/npm" "start"
  npm ERR! node v6.14.3
  npm ERR! npm  v3.10.10
  npm ERR! code ELIFECYCLE
  npm ERR! client@1.0.0 start: `node build/build.js`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the client@1.0.0 start script 'node build/build.js'.
  npm ERR! Make sure you have the latest version of node.js and npm installed.
  npm ERR! If you do, this is most likely a problem with the client package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     node build/build.js
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs client
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls client
  npm ERR! There is likely additional logging output above.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     /var/app/current/npm-debug.log
  </code></pre>