open-consul/ui/packages/consul-ui/app/components/app-error/index.hbs

<AppView>
  <BlockSlot @name="header">
    <h1>
      Error {{@error.status}}
    </h1>
  </BlockSlot>
  <BlockSlot @name="content">
    <ErrorState
      @error={{@error}}
      @login={{if (eq @error.status "403") @login}}
    />
  </BlockSlot>
</AppView>