Text input: Error

<div class="au-form__item">
    <label for="email">
        Email address
        <span class="form-required">(mandatory)</span> </label>
    <div class="au-form__item-description">
        Health will not share this email. It will only be used to contact you regarding your feedback.
    </div>
    <input class="au-text-input au-text-input--block error" type="email" id="email" name="email">
</div>