error.phtml

<div class="code_500">
<h2>Application Error</h2>

<p>
    An error occurred processing this page; please try again later.
</p>

<?php
if (!$this->display_exceptions) {
    echo "<p>Display exceptions is disabled</p>\n";
    return;
}
$exception = $this->exception;
if (!$exception instanceof \Exception) {
    echo "<p>Invalid exception found</p>\n";
    return;
}
?>
<h3>Exception information:</h3>
<p>
    <b>Message:</b> <?php echo $this->vars()->escape($exception->getMessage()) ?>
</p>

<h3>Stack trace:</h3>
<pre>
<?php echo $exception->getTraceAsString() ?> 
</pre>

</div>