Se instala la extensión por Magento Connect, pero no puedo entrar al backend

[jgutierrezs]

Hola amigos, soy nuevo en esto, y a partir de que instalé una extensión de facebook ya no pude instalar nada más, el backend no entra.. con la extensión que ponga siempre marca lo mismo:

Warning: include(/var/www/vhosts/mundopop.mx/httpdocs/includes/src/WeltPixel_GoogleCards_Helper_Data.php): failed to open stream: No such file or directory  in /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Varien_Autoload.php on line 93

#0 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Varien_Autoload.php(93): mageCoreErrorHandler(2, 'include(/var/ww...', '/var/www/vhosts...', 93, Array)
#1 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Varien_Autoload.php(93): Varien_Autoload::autoload()
#2 [internal function]: Varien_Autoload->autoload('WeltPixel_Googl...')
#3 /var/www/vhosts/mundopop.mx/httpdocs/app/Mage.php(547): spl_autoload_call('WeltPixel_Googl...')
#4 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Mage_Adminhtml_Block_Page_Menu.php(325): Mage::helper('weltpixel_googl...')
#5 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Mage_Adminhtml_Block_Page_Menu.php(144): Mage_Adminhtml_Block_Page_Menu->_isEnabledModuleOutput(Object(Varien_Simplexml_Element))
#6 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Mage_Adminhtml_Block_Page_Menu.php(171): Mage_Adminhtml_Block_Page_Menu->_buildMenuArray(Object(Varien_Simplexml_Element), 'weltpixel/', 1)
#7 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Mage_Adminhtml_Block_Page_Menu.php(98): Mage_Adminhtml_Block_Page_Menu->_buildMenuArray()
#8 /var/www/vhosts/mundopop.mx/httpdocs/app/design/adminhtml/default/default/template/page/menu.phtml(30): Mage_Adminhtml_Block_Page_Menu->getMenuArray()
#9 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(3387): include('/var/www/vhosts...')
#10 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(3418): Mage_Core_Block_Template->fetchView('adminhtml/defau...')
#11 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(3432): Mage_Core_Block_Template->renderView()
#12 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Mage_Adminhtml_Block_Template.php(81): Mage_Core_Block_Template->_toHtml()
#13 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(2592): Mage_Adminhtml_Block_Template->_toHtml()
#14 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(2310): Mage_Core_Block_Abstract->toHtml()
#15 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(2254): Mage_Core_Block_Abstract->_getChildHtml('menu', true)
#16 /var/www/vhosts/mundopop.mx/httpdocs/app/design/adminhtml/default/default/template/page.phtml(53): Mage_Core_Block_Abstract->getChildHtml('menu')
#17 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(3387): include('/var/www/vhosts...')
#18 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(3418): Mage_Core_Block_Template->fetchView('adminhtml/defau...')
#19 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(3432): Mage_Core_Block_Template->renderView()
#20 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/Mage_Adminhtml_Block_Template.php(81): Mage_Core_Block_Template->_toHtml()
#21 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(2592): Mage_Adminhtml_Block_Template->_toHtml()
#22 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(28076): Mage_Core_Block_Abstract->toHtml()
#23 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(13987): Mage_Core_Model_Layout->getOutput()
#24 /var/www/vhosts/mundopop.mx/httpdocs/app/code/core/Mage/Adminhtml/controllers/DashboardController.php(43): Mage_Core_Controller_Varien_Action->renderLayout()
#25 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(14015): Mage_Adminhtml_DashboardController->indexAction()
#26 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(18399): Mage_Core_Controller_Varien_Action->dispatch('index')
#27 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(17933): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#28 /var/www/vhosts/mundopop.mx/httpdocs/includes/src/__default.php(20705): Mage_Core_Controller_Varien_Front->dispatch()
#29 /var/www/vhosts/mundopop.mx/httpdocs/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#30 /var/www/vhosts/mundopop.mx/httpdocs/index.php(89): Mage::run('', 'store')
#31 {main}

[jgutierrezs]

Se me paso comentar que la única manera de desinstalar la extensión es entrando directo al downloader: http://mundopop.mx/downloader/ y logueandome.. Por favor alguien que me ayude a recuperar mi magento

[Damian Culotta]

Hola @jgutierrezs,

Parece que estás usando el compiler de Magento.

Lo ideal sería desactivarlo y, para esto, vas a necesitar usar un comando shell de Magento.

Deberás ingresar por consola al directorio shell de tu Magento y ejeuctar:

php compiler.php state

Ahora verás el estado del Compiler. Si está activado y hay código compilado, ejecutá lo siguiente:

php compiler.php disable
php compiler.php clear

Con esto se ha desactivado y se eliminaron los archivos generados.

¿Podrías ahora revisar si todo funciona correctamente?