500.21 Bad module “ManagedPipelineHandler” in its module list

Question

I am getting the error:

HTTP Error 500.21 - Internal Server Error Handler \"CloudConnectHandler\" has a bad module \"ManagedPipelineHandler\" in its module list

Answer 1

I had this problem every time I deployed a new website or updated an existing one using MSDeploy.

I was able to fix this by unloading the app domain using MSDeploy with the following syntax:

msdeploy.exe -verb:sync -source:recycleApp -dest:recycleApp="Default Web Site/myAppName",recycleMode=UnloadAppDomain

You can also stop, start, or recycle the application pool - more details here: http://technet.microsoft.com/en-us/library/ee522997%28v=ws.10%29.aspx

While Armaan's solution helped get me unstuck, it did not make the problem go away permanently.

Answer 2

I had this issue in Windows 10 when I needed IIS instead of IIS Express. New Web Project failed with OP's error. Fix was

Control Panel > Turn Windows Features on or off > Internet Information Services > World Wide Web Services > Application Development Features

tick ASP.NET 4.7 (in my case)

Answer 3

Install .NET framework as below, it will work .NET version 4.5 as well.

%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -ir

Some time only give aspnet_regiis.exe -i don't work so give aspnet_regiis.exe -ir in above path.

Answer 4

I got this error on my ASP.Net 4.5 app on Windows Server 2012 R2.

Go to start menu -> "Turn windows features on or off". A wizard popped up for me.

Click Next to Server Roles

I had to check these to get this to work, located under Web Server IIS->Web Server-> Application Development (these are based on Jeremy Cook's answer above):

Then click next to Features and make sure the following is checked:

Then click next and Install. At this point, the error went away for me. Good luck!

Answer 5

This is because IIS 7 uses http handlers from both <system.web><httpHandlers> and <system.webServer><handlers>. if you need CloudConnectHandler in your application, you should add <httpHandlers> section with this handler to the <system.web>:

<httpHandlers>
    <add verb="*" path="CloudConnect.aspx" type="CloudConnectHandler" />
</httpHandlers>

and also add preCondition attribute to the handler in <system.webServer>:

<handlers>
  <add name="CloudConnectHandler" verb="*" path="CloudConnect.aspx" type="CloudConnectHandler" preCondition="integratedMode" />
</handlers>

Hope it helps

Answer 6

if it is IIS 8 go to control panel, turn windows features on/off and enable Bad "Named pipe activation" then restart IIS. Hope the same works with IIS 7