bid/module/Listings/view/listings/error/not-found.phtml

<?php
/**
 * @version 7.6
 */
?>
<h1 class="headline">
    <span><?php echo $this->_('404 Error'); ?></span>
</h1>

<h4>
    <?php echo $this->_('The page you are looking for could not be found.'); ?>
</h4>
<p>
    <?php echo $this->_('Try checking the URL for errors, then hit the refresh button on your browser.'); ?>
</p>