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HTTP Error 500.24 - Internal Server Error An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode

I have webpage which has gridview, one of the columns will have a image. When clicked on image it will open the PDF saved on the web server. It was working fine but I am getting below error

HTTP Error 500.24 - Internal Server Error An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.

I googled and did as suggested in HTTP Error 500.22 - Internal Server Error (An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.) I made sure the application pool is classic and the webconfig is correct, but I am still getting that error when clicked on image which has to open the saved PDF.

enter image description here

Solution

  • Your error is specifically to do with 'client impersonation'. I had the same error on one machine but not on another. By comparing settings I worked out the difference.

    Start IIS Manager. Select the server in the left pane and double click 'Authentication' under the IIS group in the central pane. Select ASP.NET Impersonation and select 'Disable' at the top of the right pane.