Laravel 5.1 Server - Class not found

I'm trying to deploy my Laravel 5.1 project. On my scotchbox (vagrant) everything works perfectly, but when I deploy it on the server I get this error

FatalErrorException in ProviderRepository.php line 146: Class 'League\ColorExtractor\Laravel\ColorExtractorServiceProvider' not found

I'm guessing it's a permission issue, but I tried to solve it and nothing seems to work.

The project folder: drwxr-x--- owned by apache.

via Chebli Mohamed