HTTP Error 500.19 - Internal Server Error

If you received this error when configuring an application in IIS

Error Summary
HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.

Add the IIS_IUSRS and IUSR to your application directory permission. Right click the application on IIS, select Edit Permissions..., click Security tab, click Edit... button; on Enter the object names to select, paste this: IIS_IUSRS; IUSR. Click OK, click OK, refresh the erring page


Here's the video: http://www.youtube.com/watch?v=v5VMGYlGfag