Easily see what's going on under the hood of your October CMS application.
To install with Composer, run from your project root
composer require rainlab/debugbar-plugin
Set debug to true in config/app.php, and the debugbar should appear on your site to all authenticated backend users with the rainlab.debugbar.access_debugbar permission.
If you would like to make the debugbar accessible to all users regardless of authentication & permissions, then set allow_public_access to true in config/rainlab/debugbar/config.php.
See barryvdh/laravel-debugbar for more usage instructions and documentation.
To include exceptions in the response header of ajax calls set debugAjax to true in config/app.php.