magento2 – Exception #0 (ReflectionException): Class MageplazaEmailAttachmentsMailEmailMessageFactory does not exist

i am getting below error when i open vitalticks.in

exception(s):
Exception #0 (ReflectionException): Class MageplazaEmailAttachmentsMailEmailMessageFactory does not exist

Exception #0 (ReflectionException): Class MageplazaEmailAttachmentsMailEmailMessageFactory does not exist
<pre>#1 MagentoFrameworkCodeReaderClassReader->getConstructor() called at (vendor/magento/framework/ObjectManager/Definition/Runtime.php:49)
#2 MagentoFrameworkObjectManagerDefinitionRuntime->getParameters() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:100)
#3 MagentoFrameworkObjectManagerFactoryCompiled->create() called at (vendor/magento/framework/ObjectManager/ObjectManager.php:70)
#4 MagentoFrameworkObjectManagerObjectManager->get() called at (vendor/magento/framework/Mail/Template/TransportBuilder.php:167)
#5 MagentoFrameworkMailTemplateTransportBuilder->__construct() called at (generated/code/Magento/Framework/Mail/Template/TransportBuilder/Interceptor.php:14)
#6 MagentoFrameworkMailTemplateTransportBuilderInterceptor->__construct() called at (vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:116)
#7 MagentoFrameworkObjectManagerFactoryAbstractFactory->createObject() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:108)
#8 MagentoFrameworkObjectManagerFactoryCompiled->create() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:150)
#9 MagentoFrameworkObjectManagerFactoryCompiled->get() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:79)
#10 MagentoFrameworkObjectManagerFactoryCompiled->create() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:150)
#11 MagentoFrameworkObjectManagerFactoryCompiled->get() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:79)
#12 MagentoFrameworkObjectManagerFactoryCompiled->create() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:150)
#13 MagentoFrameworkObjectManagerFactoryCompiled->get() called at (vendor/magento/framework/ObjectManager/Factory/Compiled.php:79)
#14 MagentoFrameworkObjectManagerFactoryCompiled->create() called at (vendor/magento/framework/ObjectManager/ObjectManager.php:70)
#15 MagentoFrameworkObjectManagerObjectManager->get() called at (vendor/magento/framework/Interception/PluginList/PluginList.php:250)
#16 MagentoFrameworkInterceptionPluginListPluginList->getPlugin() called at (vendor/magento/framework/Interception/Interceptor.php:119)
#17 MagentoCmsControllerIndexIndexInterceptor->MagentoFrameworkInterception{closure}() called at (vendor/magento/framework/Interception/Interceptor.php:153)
#18 MagentoCmsControllerIndexIndexInterceptor->___callPlugins() called at (generated/code/Magento/Cms/Controller/Index/Index/Interceptor.php:26)
#19 MagentoCmsControllerIndexIndexInterceptor->dispatch() called at (vendor/magento/framework/App/FrontController.php:159)
#20 MagentoFrameworkAppFrontController->processRequest() called at (vendor/magento/framework/App/FrontController.php:99)
#21 MagentoFrameworkAppFrontController->dispatch() called at (vendor/magento/framework/Interception/Interceptor.php:58)
#22 MagentoFrameworkAppFrontControllerInterceptor->___callParent() called at (vendor/magento/framework/Interception/Interceptor.php:138)
#23 MagentoFrameworkAppFrontControllerInterceptor->MagentoFrameworkInterception{closure}() called at (vendor/magento/module-store/App/FrontController/Plugin/RequestPreprocessor.php:94)
#24 MagentoStoreAppFrontControllerPluginRequestPreprocessor->aroundDispatch() called at (vendor/magento/framework/Interception/Interceptor.php:135)
#25 MagentoFrameworkAppFrontControllerInterceptor->MagentoFrameworkInterception{closure}() called at (vendor/magento/module-page-cache/Model/App/FrontController/BuiltinPlugin.php:73)
#26 MagentoPageCacheModelAppFrontControllerBuiltinPlugin->aroundDispatch() called at (vendor/magento/framework/Interception/Interceptor.php:135)
#27 MagentoFrameworkAppFrontControllerInterceptor->MagentoFrameworkInterception{closure}() called at (vendor/magento/framework/Interception/Interceptor.php:153)
#28 MagentoFrameworkAppFrontControllerInterceptor->___callPlugins() called at (generated/code/Magento/Framework/App/FrontController/Interceptor.php:26)
#29 MagentoFrameworkAppFrontControllerInterceptor->dispatch() called at (vendor/magento/framework/App/Http.php:137)
#30 MagentoFrameworkAppHttp->launch() called at (vendor/magento/framework/App/Bootstrap.php:261)
#31 MagentoFrameworkAppBootstrap->run() called at (index.php:39)
</pre>