HTTP Error 500.21 - Internal Server Error
Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list
First need to installed aspnet_regiis
the aspnet_regiis is in the bellow path
C:\Windows\Microsoft.NET\Framework\v4.0.30319
Go to command prompt right click on cmd prompt Run as administrator and go to the path then type aspnet_regiis.exe -i that's it
