[Vue warn]: Cannot find element: #app
Error says it all. Vue can't find #app element, so you need to add it:
<div id='app'></div>
Sometime everything seems got , but we are still getting same error then you have to copy this code and paste in app. blade.
<head><!-- Scripts --><script src="{{ asset('js/app.js') }}" defer></script><!-- Fonts --><link rel="dns-prefetch" href="//fonts.gstatic.com"><link href="https://fonts.googleapis.com/css?family=Nunito" rel="stylesheet"><!-- Styles --><link href="{{ asset('css/app.css') }}" rel="stylesheet"></head><body><div id="app"> . . . . . .</div></body>
Verify that your main design file app.blade.php contains a div with the app id just after the <body> tag just like this:
<body> <div id="app"> . . . </div></body>