blitz/views/lots/_alert.php

<?php //if ($module->enableFlashMessages): ?>
    <div class="row">
        <div class="col-xs-12">
            <?php foreach (Yii::$app->session->getAllFlashes() as $type => $message): ?>
                <?php if (in_array($type, ['success', 'danger', 'warning', 'info'])): ?>
                    <div class="alert alert-<?= $type ?>">
                        <?= $message ?>
                    </div>
                <?php endif ?>
            <?php endforeach ?>
        </div>
    </div>
<?php //endif ?>