How can I fix a class not found after composer update in Symfony? [closed]

  class, composer-php, error-handling, symfony

I made a composer update and since then I get an error message:

Class “OneupUploaderBundleUploaderNamingUniqidNamer” not found
while loading “AppControllermyAppOriginalNameNamer”.

And I just cannot figure out to fix it.
I made again composer install, and also composer dumpautoload but nothing helps

Everything was fine until I made composer update..

Source: Symfony Questions