composer update error after install on laravel 5.2

[cby016]

If I run "compser update" or if I try to install another package after installing yours I get the following error:

Generating autoload files

Illuminate\Foundation\ComposerScripts::postUpdate
php artisan optimize
PHP Fatal error: Class 'RagingDave\SimplerSaml\SimplerSamlServiceProvider' not found in /var/www/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php on line 146

[Symfony\Component\Debug\Exception\FatalErrorException]
Class 'RagingDave\SimplerSaml\SimplerSamlServiceProvider' not found

Script php artisan optimize handling the post-update-cmd event returned with an error

[RuntimeException]
Error Output: PHP Fatal error: Class 'RagingDave\SimplerSaml\SimplerSamlServiceProvider' not found in /var/www/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php on line 146