Fatal error: Uncaught Error: Call to a member function getId() on null in /srv/www/htdocs/bitcao.com.br/app/code/local/Amasty/Promo/Model/Observer.php:428
Stack trace:
#0 /srv/www/htdocs/bitcao.com.br/app/code/core/Mage/Core/Model/App.php(1358): Amasty_Promo_Model_Observer->onCartItemUpdateBefore(Object(Varien_Event_Observer))
#1 /srv/www/htdocs/bitcao.com.br/app/code/core/Mage/Core/Model/App.php(1337): Mage_Core_Model_App->_callObserverMethod(Object(Amasty_Promo_Model_Observer), 'onCartItemUpdat...', Object(Varien_Event_Observer))
#2 /srv/www/htdocs/bitcao.com.br/app/Mage.php(448): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#3 /srv/www/htdocs/bitcao.com.br/app/code/core/Mage/Core/Controller/Varien/Action.php(531): Mage::dispatchEvent('controller_acti...', Array)
#4 /srv/www/htdocs/bitcao.com.br/app/code/core/Mage/Core/Controller/Front/Action.php(69): Mage_Core_Controller_Varien_Action->preDispatch()
#5 /srv/www/htdocs/bitcao.com.br/app/code/core/Mage/Checkout/controllers/CartController.php(129): Mage in /srv/www/htdocs/bitcao.com.br/app/code/local/Amasty/Promo/Model/Observer.php on line 428