First time I completed the installation and ran it with "npm run serve", all menu items were showing and all worked well.

After shutdown of my system and retrying at a later time, only Dashboard, Login and Register menu items show (see screenshot).

In the network tab, I note a 404 error and the following in console:

[vue-warn] Cannot find element: #app(webpack-internal:///./node_modules/vue/dist/vue.esm.js)

With npm run build, full menu still does not show and I see 404 in network table and error in console:

GET http://localhost/js/app.js net::ERR_ABORTED 404 (Not Found)

These seem like very basic stuff, not sure why I'm getting them from a fresh install. How do I fix?