Fixed: Fatal error: Class ‘Mage_Adminhtml_Controller_action’ not found

Issue:

Fatal error: Class ‘Mage_Adminhtml_Controller_action’ not found in /home/portofoo/public_html/test/app/code/local/Sm/Megamenu/controllers/Adminhtml/MenugroupController.php on line 11

Solution:

Please go to /public_html/test/app/code/local/Sm/Megamenu/controllers/Adminhtml/MenugroupController.php and find:

class Sm_Megamenu_Adminhtml_MenugroupController extends Mage_Adminhtml_Controller_action

1	class Sm_Megamenu_Adminhtml_MenugroupController extends Mage_Adminhtml_Controller_action

=> changes to:

class Sm_Megamenu_Adminhtml_MenugroupController extends Mage_Adminhtml_Controller_Action

1	class Sm_Megamenu_Adminhtml_MenugroupController extends Mage_Adminhtml_Controller_Action

Thanks!