app/views/policy_manager/401.erb
<div class="page">
<div class="page-content">
<div class="container text-center">
<div class="display-1 text-muted mb-5">
<i class="si si-exclamation"></i> 401
</div>
<h1 class="h2 mb-3">Oops.. You just found an error page..</h1>
<p class="h4 text-muted font-weight-normal mb-7">We are sorry but you are not authorized to access this page…</p>
<a class="btn btn-primary" href="javascript:history.back()">
<i class="fa fa-arrow-left mr-2"></i>Go back
</a>
</div>
</div>
</div>