Easily see what's going on under the hood of your October application.
If you installed the plugin via October's plugin marketplace, just set debug to true in config/app.php, and the debugbar should appear in your backend. If the plugin was installed without using the marketplace, you'll need to also run a composer update from /plugins/bedard/debugbar. 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.