Error: Class "Amasty\Base\Observer\AddBodyClassName" not found in /var/www/html/eco/lib/internal/Magento/Framework/ObjectManager/Factory/AbstractFactory.php:121 Stack trace: #0 /var/www/html/eco/lib/internal/Magento/Framework/ObjectManager/Factory/Compiled.php(108): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject() #1 /var/www/html/eco/lib/internal/Magento/Framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Compiled->create() #2 /var/www/html/eco/lib/internal/Magento/Framework/Event/ObserverFactory.php(36): Magento\Framework\ObjectManager\ObjectManager->get() #3 /var/www/html/eco/lib/internal/Magento/Framework/Event/Invoker/InvokerDefault.php(72): Magento\Framework\Event\ObserverFactory->get() #4 /var/www/html/eco/lib/internal/Magento/Framework/Event/Manager.php(65): Magento\Framework\Event\Invoker\InvokerDefault->dispatch() #5 /var/www/html/eco/generated/code/Magento/Framework/Event/Manager/Proxy.php(95): Magento\Framework\Event\Manager->dispatch() #6 /var/www/html/eco/lib/internal/Magento/Framework/View/Result/Layout.php(167): Magento\Framework\Event\Manager\Proxy->dispatch() #7 /var/www/html/eco/lib/internal/Magento/Framework/Interception/Interceptor.php(58): Magento\Framework\View\Result\Layout->renderResult() #8 /var/www/html/eco/lib/internal/Magento/Framework/Interception/Interceptor.php(138): Magento\Framework\View\Result\Page\Interceptor->___callParent() #9 /var/www/html/eco/lib/internal/Magento/Framework/Interception/Interceptor.php(153): Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception\{closure}() #10 /var/www/html/eco/generated/code/Magento/Framework/View/Result/Page/Interceptor.php(32): Magento\Framework\View\Result\Page\Interceptor->___callPlugins() #11 /var/www/html/eco/lib/internal/Magento/Framework/App/Http.php(120): Magento\Framework\View\Result\Page\Interceptor->renderResult() #12 /var/www/html/eco/lib/internal/Magento/Framework/App/Bootstrap.php(264): Magento\Framework\App\Http->launch() #13 /var/www/html/eco/pub/index.php(30): Magento\Framework\App\Bootstrap->run() #14 {main}