Quasar initialization in vue app

[fdlprod]

Hello,

i am creating a vue app and adding quasar into. when i lanuch server i have this error:

Uncaught TypeError: Cannot read property ‘extend’ of undefined
at eval (QPage.js?9989:7)
at Module…/node_modules/quasar/src/components/page/QPage.js (chunk-vendors.js:2483)
at webpack_require (app.js:854)
at fn (app.js:151)
at eval (HelloWorld.vue?82e3:1)
at Module…/src/components/HelloWorld.vue (app.js:1148)
at webpack_require (app.js:854)
at fn (app.js:151)
at eval (App.vue?3dfd:105)
at Module…/node_modules/cache-loader/dist/cjs.js?!./node_modules/babel-loader/lib/index.js!./node_modules/vue-cli-plugin-quasar/lib/loader.transform-quasar-imports.js!./node_modules/vue-cli-plugin-quasar/lib/loader.auto-import.js?kebab!./node_modules/cache-loader/dist/cjs.js?!./node_modules/vue-loader-v16/dist/index.js?!./src/App.vue?vue&type=script&lang=js (app.js:1007)

step to reproduce :

vue create app test
cd test
vue add quasar
yarn serve

then try to launch localhost:8081

and the error in console is displayed, any Idea ?

vue 3 , vue4cli

thanks

[beets]

@fdlprod Quasar isn’t Vue 3 compatible yet, watch here for updates: https://github.com/quasarframework/quasar/issues/7836