open-vault/ui/app/templates/vault/error.hbs

<NavHeader data-test-header-without-nav as |Nav|>
  <Nav.home>
    <HomeLink @class="navbar-item splash-page-logo">
      <LogoEdition />
    </HomeLink>
  </Nav.home>
</NavHeader>
<section class="section">
  <div class="container">
    {{#if (eq this.model.httpStatus 404)}}
      <NotFound @model={{this.model}} />
    {{else}}
      <PageHeader as |p|>
        <p.levelLeft>
          <h1 class="title is-3 has-text-grey">
            {{#if (eq this.model.httpStatus 403)}}
              Not authorized
            {{else}}
              Error
            {{/if}}
          </h1>
        </p.levelLeft>
      </PageHeader>
      <BlockError>
        {{#if this.model.message}}
          <p>{{this.model.message}}</p>
        {{/if}}
        {{#each this.model.errors as |error|}}
          <p>{{error}}</p>
        {{/each}}
      </BlockError>
    {{/if}}
  </div>
</section>