yg_profile-2.0.0/templates/layout/page--401.html.twig

    <div class="nav-menu fixed-top">
        <div class="container">
            <div class="row">
                <div class="col-md-12">
                    <nav class="navbar navbar-dark navbar-expand-lg">
                        {{ page.header}} <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button>
                        <div class="collapse navbar-collapse" id="navbar">
                            {{ page.primary_menu }}
                        </div>
                    </nav>
                </div>
            </div>
        </div>
    </div>    
    <div id="home" style="background-image:url({{ bg_image_url }})";>
        <div class="container h-100">
            <div class="row h-100">
                <div class="col-md-12 text-center slider-content wow slideInUp">
                    <h1 class="">{{ page['#title'] }}</h1>
                </div>
            </div>
        </div>
    </div>

    <section {{ content_attributes.addClass(content_classes) }}>
            {# Content #}
            {% block content %}
              <a id="main-content"></a>
              {{ page.content }}
            {% endblock %}
    </section>

<footer class="my-5 text-center">
    {% if copyright %}
        {{copyright|striptags('<b>,<strong>,<p>,<a>,<pre>')|raw}}
    {% endif %}  
</footer>