Fatal error: Uncaught Error: Class 'Mageplaza\SocialLogin\Helper\Data' not found in /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:111 Stack trace: #0 /var/www/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(108): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Mageplaza\\Socia...', Array) #1 /var/www/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(150): Magento\Framework\ObjectManager\Factory\Compiled->create('Mageplaza\\Socia...') #2 /var/www/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(79): Magento\Framework\ObjectManager\Factory\Compiled->get('Mageplaza\\Socia...') #3 /var/www/html/vendor/magento/framework/ObjectManager/ObjectManager.php(56): Magento\Framework\ObjectManager\Factory\Compiled->create('Mageplaza\\Socia...', Array) #4 /var/www/html/vendor/magento/framework/View/Element/BlockFactory.php(45): Magento\Framework\ObjectManager\ObjectManager->create('Mageplaza\\Socia...', Array) #5 /var/www/html/app/co in /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php on line 111