Development Mode - Just For You

In ```php

<br />
Add this code directly underneath the copyright notice:<br />
<br />
<br />
if ($_SERVER['REMOTE_ADDR'] == '') {<br />
	define('DEVELOPMENT', true);<br />
	error_reporting(E_ALL);<br />
	ini_set('display_errors', 'On');<br />
}<br />

```<br />
<br />
Where<br />
``` equals your IP address.<br />
This will allow you to review any error messages when displayed, and not to your customers.

Also, it might be a good idea to activate the debugger for both the admin panel and the storefront. Just add the following line:

define('DEBUG_MODE', true);

after this one:

ini_set('display_errors', 'On');

You can check more information about bult-in debugger here:

Debugger — CS-Cart 4.2.x documentation