Server Error in '/' Application.

Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS.

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Để fix: vào IIS, right click cái folder /edu, chọn Properties, ngay tab đầu tiên (Virtual Directory) go to Application name textbox, kế bên nó sẽ có button [Create], click vào đó để configure folder /edu thành 1 application trong IIS