app/components/flash-message-error/template.hbs
<div class="rounded-md bg-red-50 p-4">
<div class="flex">
<div class="shrink-0">
<svg class="h-5 w-5 text-red-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
<path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clip-rule="evenodd" />
</svg>
</div>
<div class="ml-3">
<h3 class="text-sm font-semibold text-red-800">{{@title}}</h3>
<div class="mt-2 text-sm text-red-700">
<p>{{@content}}</p>
</div>
</div>
</div>
</div>