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  my web config file looks like this    lt  xml version  1 0  encoding  utf-8   gt   lt configuration gt     lt system webServer gt       lt handlers gt         lt add name  CloudConnectHandler  verb     path  CloudConnect aspx  type  CloudConnectHandler  resourceType  Unspecified    gt       lt  handlers gt     lt  system webServer gt     lt system web gt       lt customErrors mode  Off    gt       lt compilation debug  true  targetFramework  4 0  batch  false  gt         lt assemblies gt           lt add assembly  System Xml Linq  Version 4 0 0 0  Culture neutral  PublicKeyToken B77A5C561934E089    gt           lt add assembly  System Core  Version 4 0 0 0  Culture neutral  PublicKeyToken B77A5C561934E089    gt           lt add assembly  Microsoft CSharp  Version 4 0 0 0  Culture neutral  PublicKeyToken B03F5F7F11D50A3A    gt         lt  assemblies gt       lt  compilation gt       lt pages gt         lt controls gt           lt add tagPrefix  ajaxToolkit  assembly  AjaxControlToolkit  namespace  AjaxControlToolkit    gt         lt  controls gt       lt  pages gt           lt identity impersonate  true    gt           lt authentication mode  Forms    gt     lt  system web gt     lt system codedom gt       lt compilers gt         lt compiler language  c  cs csharp  extension   cs  warningLevel  4  type  Microsoft CSharp CSharpCodeProvider  System  Version 4 0 0 0  Culture neutral  PublicKeyToken b77a5c561934e089  gt           lt providerOption name  CompilerVersion  value  v4 0    gt           lt providerOption name  WarnAsError  value  false    gt         lt  compiler gt       lt  compilers gt     lt  system codedom gt     lt appSettings gt       lt add key  CloudConnectAuthorization  value  xxxx    gt       lt add key  ConnectionInfo  value  xxxx    gt       lt add key  ConnectionString  value  xxxx    gt       lt add key  DefaultChannel  value  xxxx    gt       lt add key  LoginValidationConnectionString  value  xxxx    gt     lt  appSettings gt     lt runtime gt       lt assemblyBinding xmlns  urn schemas-microsoft-com asm v1  gt         lt dependentAssembly gt           lt assemblyIdentity name  protobuf-net  publicKeyToken  257b51d87d2e4d67  culture  neutral    gt           lt bindingRedirect oldVersion  0 0 0 0-2 0 0 640  newVersion  2 0 0 640    gt         lt  dependentAssembly gt       lt  assemblyBinding gt     lt  runtime gt   lt  configuration gt    There is a lot of advice out there indicating that asp net is not installed correctly   The usual fix is to run     windir  Microsoft NET Framework64 v4 0 30319 aspnet regiis exe -i   or   windir  Microsoft NET Framework v4 0 21006 aspnet regiis exe -i   I have run both  without any errors   I have restarted IIS  but the problem still persists   The site is using an application pool   The app pool is started   net framework   4 0  Managed Pipeline   Classic  Identity   LocalSystem   I ve spent the last couple hours trying to figure out what the problem is   I m hoping someone can help

User · Answer

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)

User · Answer

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

User · Answer

To fix the problem  I tried to run    windir  Microsoft NET Framework64 v4 0 30319 aspnet regiis exe -i  However It didn t work for me  I have to run another command line in CMD window as administrator  Here is the command      dism  online  enable-feature  featurename IIS-ASPNET45   or     dism  online  enable-feature  featurename IIS-ASPNET45  all   Hope it will help

User · Answer

For me  I was getting this error message when using PUT or DELETE to WebAPI   I also tried re-registering  NET Framework as suggested but to no avail   I was able to fix this by disabling WebDAV for my individual application pool  this stopped the  bad module  error when using PUT or DELETE   Disable WebDAV for Individual App Pool    Click the affected application pool Find WebDAV Authoring Tools in the list Click to open it Click Disable WebDAV in the top right    This link is where I found the instructions but it s not very clear

User · Answer

Try switching to Integrated mode   See the following thread   IIS 7  HttpHandler and HTTP Error 500 21

User · Answer

This is because IIS 7 uses http handlers from both  lt system web gt  lt httpHandlers gt  and  lt system webServer gt  lt handlers gt   if you need CloudConnectHandler in your application  you should add  lt httpHandlers gt  section with this handler to the  lt system web gt     lt httpHandlers gt       lt add verb     path  CloudConnect aspx  type  CloudConnectHandler    gt   lt  httpHandlers gt    and also add preCondition attribute to the handler in  lt system webServer gt     lt handlers gt     lt add name  CloudConnectHandler  verb     path  CloudConnect aspx  type  CloudConnectHandler  preCondition  integratedMode    gt   lt  handlers gt    Hope it helps

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

I ran into this error on a fresh build of Windows Server 2012 R2  IIS and  NET 4 5 had been installed  but the ASP NET Server Role  version 4 5 in my case  had not been added  Make sure that the version of ASP NET you need has been added installed like ASP NET 4 5 is in this screenshot

User · Answer

I discovered that the order of adding roles and features is important  On a fresh system I activate the role  application server  and there check explicitly  net  web server support and finally process activation service Then automatically a dialogue comes up that the role  Web server  needs to be added also

User · Answer

Please follow these steps   1  Run the command prompt as administrator   2  Type either of the two lines below in the command prompt    windir  Microsoft NET Framework v4 0 30319 aspnet regiis exe -i   or   windir  Microsoft NET Framework64 v4 0 30319 aspnet regiis exe -i

[asp.net] 500.21 Bad module "ManagedPipelineHandler" in its module list

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