CAKE_PHP_TERRITORY/app/templates/Error/error500.php

<?php
/**
 * @var \App\View\AppView $this
 * @var string $message
 * @var string $url
 */
use Cake\Core\Configure;
use Cake\Error\Debugger;

$this->setLayout('error');

if (Configure::read('debug')) :
    $this->setLayout('dev_error');

    $this->assign('title', $message);
    $this->assign('templateName', 'error500.php');

    $this->start('file');
?>
<?php if ($error instanceof Error) : ?>
    <?php $file = $error->getFile() ?>
    <?php $line = $error->getLine() ?>
    <strong>Error in: </strong>
    <?= $this->Html->link(sprintf('%s, line %s', Debugger::trimPath($file), $line), Debugger::editorUrl($file, $line)); ?>
<?php endif; ?>
<?php
    echo $this->element('auto_table_warning');

    $this->end();
endif;
?>
<h2><?= __d('cake', 'An Internal Error Has Occurred.') ?></h2>
<p class="error">
    <strong><?= __d('cake', 'Error') ?>: </strong>
    <?= h($message) ?>
</p>