php - Laravel returns Patchwork\\utf8\\Bootup error -

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i have problem in laravel 4.1 project. executing on ubuntu 14.04. copied running instance of project ubuntu os. when refresh page on virtual host, blank page. , apache access logs return 500 error , error logs return following error:

 php fatal error:  class 'patchwork\\utf8\\bootup' not found in /var/www/www.domain.com/bootstrap/autoload.php on line 46

what wrong in here?

run composer update or composer install -- you're missing vendor packages.


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