Why laravel defalut logout dropdown is not working? - php

Question

I am a newbie to Laravel. The logout option is not working for me in Laravel. It shows Login and Home Menus. After I logged in it shows the username with a down arrow, but the dropdown is not working. What could be the issue?
This is my app.blade.php
<nav class="navbar navbar-expand-md navbar-light bg-white shadow-sm">
<div class="container">
<a class="navbar-brand" href="{{ url('/') }}">
{{ config('app.name', 'Laravel') }}
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="{{ __('Toggle navigation') }}">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<!-- Left Side Of Navbar -->
<ul class="navbar-nav mr-auto">
</ul>
<!-- Right Side Of Navbar -->
<ul class="navbar-nav ml-auto">
<!-- Authentication Links -->
#guest
<li class="nav-item">
<a class="nav-link" href="{{ route('login') }}">{{ __('Login') }}</a>
</li>
#if (Route::has('register'))
<li class="nav-item">
<a class="nav-link" href="{{ route('register') }}">{{ __('Register') }}</a>
</li>
#endif
#else
<li class="nav-item dropdown">
<a id="navbarDropdown" class="nav-link dropdown-toggle" href="#" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" v-pre>
{{ Auth::user()->name }}
</a>
<div class="dropdown-menu dropdown-menu-right" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="{{ route('logout') }}"
onclick="event.preventDefault();
document.getElementById('logout-form').submit();">
{{ __('Logout') }}
</a>
<a class="dropdown-item" href="{{route('admin.users.index')}}">
User Management
</a>
<form id="logout-form" action="{{ route('logout') }}" method="POST" class="d-none">
{{ csrf_field() }}
</form>
</div>
</li>
#endguest
</ul>
</div>
</div>
</nav>