Solution Find the file \vendor\magento\module-email\Model\AbstractTemplate.php and on line number 672 replace the if condition if ($storeId) with if ($storeId !== false) Explanation When you are saving the Global Configuration for the Store, you can see in the url that the current scope id is 0 (admin/theme/design_config/edit/scope/default/scope_id/0/) This is important. Now, when you save the configuration,…