Results 1 to 2 of 2

Thread: Error when running npm start on new install

    Thank you for reporting this bug. We will make it our priority to review this report.
  1. #1
    Sencha User
    Join Date
    Jul 2017

    Default Error when running npm start on new install

    Installing a new app as per

    however I keep getting an error when running npm start

    Here is the error log:
    ℹ 「ext」: ext-webpack-plugin v7.0.0, Ext JS v7.0.0.156 Commercial Edition, Sencha Cmd v7.0.0.40, webpack v4.40.2, react v16.8.6
    ℹ 「ext」: Starting development build for react
    ℹ 「wds」: Project is running at
    ℹ 「wds」: webpack output is served from /
    ℹ 「wds」: Content not from webpack is served from build
    ℹ 「wds」: 404s will fallback to /index.html
    ℹ 「ext」: ext-react-babel-plugin: reactVersion: ~16.8.6
    ℹ 「ext」: Adding ext/ext.js and ext/ext.css to index.html
    ℹ 「ext」: Copying /resources/ to: /build/resources
    ℹ 「ext」: Building Ext bundle at: /build/ext
    ℹ 「ext」: [ERR] Exception in thread "main"
    ℹ 「ext」: [ERR] java.lang.UnsupportedClassVersionError: com/sencha/command/Sencha : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond( at java.lang.ClassLoader.defineClass( at at at$000( at$ at Method) at at java.lang.ClassLoader.loadClass( at sun.misc.Launcher$AppClassLoader.loadClass( at java.lang.ClassLoader.loadClass(
    Error: 1
    at ChildProcess.child.on (/Users/tim/Code/senchatest/my-app/node_modules/@sencha/ext-webpack-plugin/dist/pluginUtil.js:591:41)
    at ChildProcess.emit (events.js:182:13)
    at maybeClose (internal/child_process.js:962:16)
    at (internal/child_process.js:381:11)
    at Socket.emit (events.js:182:13)
    at Pipe._handle.close (net.js:606:12)

  2. #2
    Sencha User
    Join Date
    Jul 2017


    I solved this by installing Java 11. Missed that prerrequisite!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts