yeah you need to build your backend. implement routes with all your functionality…
then you can use a http client within vuejs like axios as an example to talk json.
just do a pull request on dev branch here: https://github.com/quasarframework/quasar-framework.org
really appreciate any help to make things clearer…
delete your complete node installation and remove the node_modules folder and the package-lock file in your project!
then install the latest LTS version of node for windows: https://nodejs.org/en/
then do fresh install of npm -i g quasar-cli . and run npm install in your project.