Laravel 5: Enable laravel-debugbar
The installation instructions at https://github.com/barryvdh/laravel-debugbar#installation recommend setting the application debug mode to true. Also make sure, that you do not disable the debugbar in config/debugbar.php by setting the enabled=false > If I were you I would simply remove it. ( The debugbar won't work, event if the application itself is in debug mode )
Another suggestion
As far as I know the .env.example file should be renamed to .env and all apropriate variables should be set. In my case it always contains lines like this:
APP_ENV=localAPP_DEBUG=true`
Within the config/app.php file the debug value should be read from the environment variable.
return [ /* some other config values here... */ 'debug' => env('APP_DEBUG'),]
Note, that it should also be possible to simply set the value to true without using the environment based configuration values.
Maybe you can test it by manually calling \Debugbar::enable(); in one of your routes and debugging afterwards.
Hope this helps.