HTTP Error 500 19 and error code 0x80070021

Question

I have a simple webAPI build by Visual Studio 2013  It works well when I run it from VS13 but when I copy the project in local IIS it gives me the following error      HTTP Error 500 19 - Internal Server Error The requested page cannot be   accessed because the related configuration data for the page is   invalid    Detailed Error Information   Module     IIS Web Core  Notification       BeginRequest  Handler    Not yet determined  Error Code     0x80070021  Config Error       This configuration section cannot be used at this path  This happens when the section is locked at a parent level  Locking is either by default  overrideModeDefault  Deny    or set explicitly by a location tag with overrideMode  Deny  or the legacy allowOverride  false    Config File       C  inetpub wwwroot APITeslin web config     Config Source    36     lt system webServer gt    37       lt handlers gt    38         lt remove name  ExtensionlessUrlHandler-Integrated-4 0    gt

User · Answer

I also was getting the same problem but after brain storming with IIS and google for many hours. I found out the solution. This error is because some settings are disabled in IIS applicationHost.config.

Below are the steps to solution:

Go to C:\Windows\System32\inetsrv\config\applicationHost.config and open in notepad
Change the following key value present in
- <section name="handlers" overrideModeDefault="Deny" /> change this value from "Deny" to "Allow"
- <section name="modules" allowDefinition="MachineToApplication" overrideModeDefault="Deny" /> change this value from "Deny" to "Allow"

It worked for me.

User · Answer

It works and save my time  Try it HTTP Error 500 19     Internal Server Error     0x80070021  IIS 8 5

User · Answer

I solved this by doing the following   WebServer ISS - gt WebServer- gt Application Development add  NET Extensibility 3 5 add  NET Extensibility 4 5 add ASP NET 4 5 add ISAPI Extensions add ISAPI Filters

User · Answer

As the error idnicates -  This happens when the section is locked at a parent level   To unlock the section you can use appcmd exe and execute the following command    windir  system32 inetsrv appcmd exe unlock config -section system webServer handlers -commitpath apphost   For more information on about section locking and what a parent configuration context is refer to IIS documentation

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In our case  we struggled with this error for quite some days  It turns out that in control panel  programs  turn windows features on or off    We selected Internet Information Services  world wide web services  Application development features and there we check the set of features associated with our development environment  For example  ASP NET 4 6   NET Extensibility 4 6  etc   It works

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Got precisely the same error and came to this question  As  SpaceBison mentioned in comments  this answer describes the solution - https   stackoverflow com a 12867753 404099  I spotted it too late and it misses some steps  This is what worked for me   Windows Server 2012  IIS 8 5  Should work for other versions too    Go to server manager  click add roles and features In the roles section choose  Web Server   Under Security sub-section choose everything  I excluded digest  IP restrictions and URL authorization as we don t use them  Under Application Development choose  NET Extensibility 4 5  ASP NET 4 5 and both ISAPI entries  In the features section choose  NET 3 5   NET 4 5  ASP NET 4 5 In the web server section choose  Web Server  all   Management Tools  IIS Management Console and Management Service   Windows Authentication  - if you are using any of it

User · Answer

In my case  there were rules for IIS URL Rewrite module but I didn t have that module installed  You should check your web config if there are any modules included but not installed

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On Windows 8 1  IIS 8 5 the solution for me was to register 4 5 from the control panel    Programs and Features   Turn Windows features on or off   Information Information Services   World Wide Web Services   Application Development Features   Select ASP NET 4 5  Click OK

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Please  lt staticContent   gt  line and erased it from the web config

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Well  we re using Amazon Web Services and so we are looking to use scripts and programs to get through this problem   So I have been on the hunt for a command line tool   So first I tried the trick of running  c  Windows Microsoft NET Framework v4 0 30319 aspnet regiis exe -i  but because I m running a cloud based Windows Server 2012 it complained  This option is not supported on this version of the operating system  Administrators should instead install uninstall ASP NET 4 5 with IIS8 using the  Turn Windows Features On Off  dialog  the Server Manager management tool  or the dism exe command line tool  For more details please see http   go microsoft com fwlink  LinkID 216771   and I Googled and found the official Microsoft Support Page KB2736284   So there is a command line tool dism exe   So I tried the following  dism  online  enable-feature  featurename IIS-ASPNET45   but it complained and gave a list of featurenames to try  so I tried them one by one and I tested my WebAPI webpage after each and it worked after the bottom one in the list   dism  online  enable-feature  featurename IIS-ApplicationDevelopment dism  online  enable-feature  featurename IIS-ISAPIFilter  dism  online  enable-feature  featurename IIS-ISAPIExtensions  dism  online  enable-feature  featurename IIS-NetFxExtensibility45    And so now I can browse to my WebAPI site and see the API information   That should help a few people    However  I am not out of the woods totally myself yet and I cannot reach the website from outside the box    Still working on it    Also  I did some earlier steps following other people responses   I can confirm that the following Feature Delegation needs to be change  though I d like to find a command line tool for these    In Feature delegation  Change   Handler Mappings  from Read Only to Read Write  Change   Modules  from Read Only to Read Write  Change   SSL Settings  from Read Only to Read Write

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The solution that worked for me was to delete my current Web config and add a new one  That solved the problem for me

User · Answer

I got Error Code 0x80070021 when migration IIS7 to IIS 10 in win 2016 box     Below steps helped me to fix it   source manually change value from  quot Deny quot  to  quot Allow quot  for below settings in  windir  system32 inetsrv config  applicationHost config  under section system webServer  lt section name  quot handlers quot  overrideModeDefault  quot Deny quot    gt

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On Windows 8 1 or 10 include the  Net framework 4 5 or above as shown below

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Check if IIS server installed the URL rewrite feature   If it is not installed then make sure your web config file don t have the URL rewrite related configuration    lt  -- Make sure don t have below config  if server have not installed url rewrite feature  -- gt   lt rewrite gt     lt rules gt       lt rule name  Fail bad requests  gt         lt match url       gt        Some time we copied the config from legacy server and straight away deploy to brand new server  then we may encounter such kind of  500 issue

User · Answer

If it is windows 10 then open the powershell as admin and run the following command   dism  online  enable-feature  all  featurename IIS-ASPNET45

User · Answer

Try unlocking the relevant IIS  7 5  configuration settings at server level  as follows    Open IIS Manager Select the server in the Connections pane Open Configuration Editor in the main pane In the Sections drop down  select the section to unlock  e g  system webServer   defaultPath Click Unlock Attribute in the right pane Repeat for any other settings which you need to unlock Restart IIS  optional  - Select the server in the Conncetions pane  click Restart in the Actions pane

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If you re running IIS on that computer for the first time  you should try running the ASP NET IIS registration tool  aspnet regiis exe    Here s how to do that  If you re using  net framework v4  open command prompt as an administrator  and change directory to your  net framework base folder using   CD C  Windows Microsoft NET Framework v4 0 30319   or  if you re using a 64 bit computer  use   CD C  Windows Microsoft NET Framework64 v4 0 30319   when you ve successfully navigated to the appropriate directory  execute the ASP NET IIS registration tool using   aspnet regiis -i   If you re using a different  NET framework version  simply replace v4 0 30319 with the appropriate folder name   Hope this helps

User · Answer

I got this error while trying to host a WCF service in an empty ASP NET application  The whole solution was using  NET 4 5 platform  on IIS 8 5 running on Windows 8 1  The gotcha was to  Open up  quot Turn Windows Features on or off quot   Go to WCF section under ASP NET 4 5 advanced services  Check HTTP Activation   You ll be asked to restart the system     This should Fix the HTTP 500 19  EDIT 11-FEB-2016 Just got an issue on Windows 10 Pro  IIS 10  This time  it was an HTTP 404 0  The fix is still the same  turn on  quot HTTP Activation quot  under Windows Features - gt   NET Framework 4 6 Advanced Services - gt  WCF Services - gt  HTTP Activation

User · Answer

Your web config describes that you re using forms authentication - make sure you enable forms authentication and disable anonymous authentication in IIS under the Authentication menu  for the website that is running in IIS

[asp.net-mvc] HTTP Error 500.19 and error code : 0x80070021

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