chromium/ash/webui/personalization_app/resources/js/wallpaper/wallpaper_error_element.html

<style>
  :host {
    align-items: center;
    display: flex;
    flex-flow: column nowrap;
    height: 100%;
    justify-content: center;
    width: 100%;
  }

  p {
    font: var(--cros-body-1-font);
    margin: 0 12px 0 12px;
    max-width: 316px;
    position: relative;
    top: -12px;
  }

  iron-icon[icon='personalization-shared-illo:network_error'] {
    --iron-icon-width: 400px;
    --iron-icon-height: 177px;
    top: -24px;
  }
</style>
<iron-icon icon="personalization-shared-illo:network_error"></iron-icon>
<p>$i18n{wallpaperNetworkError}</p>