Error: HTTP Error 500.21 - Internal Server Error

Symptom

When attempting browse the application, by entering http://localhost:[port] into your browser, you receive the following error:

Handler "ExtensionlessUrlHandler-Integrated-4.0" has a bad module "ManagedPipelineHandler" in its module list

Cause

ASP.NET is not installed or is not installed completely.

Solution

Proceed as follows to resolve this error:

Step

Action

1

Click Start > All Programs > Accessories > Run.

2

Enter the following command: %windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i

3

Click OK to start the installation.

4

Restart IIS or the License Manager.
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