ng>Old Guides - </strong>You are viewing the guides for
            Ember
            v4.5.0.</div>
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        <a id="ember518998" class="ember-view es-button-secondary old-version-button" href="/release/routing/loading-and-error-substates"> Go to v5.0.0 </a>
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    <div class="article-title">
      <h1>
        Loading / Error Substates
      </h1>

        <a href="https://github.com/ember-learn/guides-source/edit/master/guides/v4.5.0/routing/loading-and-error-substates.md" target=