How to resolve Server Error in Application error

Question

I am trying to deploy an asp net application in our server while I am receiving the following error   Server Error in     Application                                            Configuration Error  Description  An error occurred during the processing of a configuration file required to service this request  Please review the specific error details below and modify your configuration file appropriately   Parser Error Message  It is an error to use a section registered as allowDefinition  MachineToApplication  beyond application level   This error can be caused by a virtual directory not being configured as an application in IIS  Source Error   Line 63              ASP NET to identify an incoming user   Line 64          -- gt  Line 65                    lt authentication  mode  Windows   gt  Line 66                    lt  -- lt forms loginUrl    SCR UI Login1 aspx   gt  Line 67                    lt  authentication gt -- gt  Source File  D  BarclaysPayamentManagementSystem scr ui web config    Line  65   What is the reason and how to resolve it   Please help

User · Answer

When you create an new web application using visual studio net  it automatically creates the virtual directory and configures it as an application  However  if you manually create the virtual directory and it is not configured as an application  then you will not be able to browse the application and may get the above error

User · Answer

I also got this error when I moved an entity framework edmx file into a  Models  sub-folder  This automatically changed the metadata in my connection string setting in my app config    So before the connection string changed    it looked something like this    lt connectionStrings gt       lt add name  MyDbEntities  connectionString  metadata res     MyDb csdl res     MyDb ssdl res     MyDb msl       lt  connectionStrings gt    And after    it added the  Models  subfolder name  btw    it also added  Models  to the namespace for the EF classes generated  and the connection string now looks something like this    lt connectionStrings gt       lt add name  MyDbEntities  connectionString  metadata res     Models MyDb csdl res     Models MyDb ssdl res     Models MyDb msl       lt  connectionStrings gt    I have a website project that references this Entity Framework DB project  But its web config did not have the updates to the connection string    and that s when I started getting the compilation error being discussed here    To fix this error  I updated the connection string in the web config in the website project to match the app config in my EntityFramework project

User · Answer

The error message is quite clear  you have a configuration element in a web config file in a subfolder of your web app that is not allowed at that level - OR you forgot to configure your web application as IIS application    Example  you try to override application level settings like forms authentication parameters in a web config in a subfolder of your application

User · Answer

I opened the Properties window for the website project in question and changed Windows Authentication to  Enabled  and that resolved my issue in VS 2019

User · Answer

I just had the same issue on visual studio 2012  For a internet application project  How to resolve    Server Error in     Application    error   Searching for answer I came across this post  but none of these answer help me  Than I found another post here on stackoverflow that has the answer for resolving this issue  Specified argument was out of the range of valid values  Parameter name  site

User · Answer

You may get this error when trying to browse an ASP NET application    The debug information shows that  This error can be caused by a virtual directory not being configured as an application in IIS     However  this error occurs primarily out of two scenarios     When you create an new web application using Visual Studio  NET  it automatically creates the virtual directory and configures it as an application  However  if you manually create the virtual directory and it is not configured as an application  then you will not be able to browse the application and may get the above error  The debug information you get as mentioned above  is applicable to this scenario     To resolve it  right click on the virtual directory - select properties and then click on   Create  next to the  Application  Label and the text box  It will automatically create the  application  using the virtual directory s name  Now the application can be accessed     When you have sub-directories in your application  you can have web config file for the sub-directory  However  there are certain properties which cannot be set in the web config of the sub-directory such as authentication  session state  you may see that the error message shows the line number where the authentication or session state is declared in the web config of the sub-directory   The reason is  these settings cannot be overridden at the sub-directory level unless the sub-directory is also configured as an application  as mentioned in the above point      Mostly  we have the practice of adding web config in the sub-directory if we want to protect access to the sub-directory files  say  the directory is admin and we wish to protect the admin pages from unauthorized users

User · Answer

I had this error when the  NET version was wrong - make sure the site is configured to the one you need   See aspnet regiis exe for details

User · Answer

I had this error with VS 2015  in my case going to the project properties page  Web tab  and clicking on Create Virtual Directory button in Servers section solved it

User · Answer

It sounds like the admin has locked the  authentication  node of the web config  which one can do in the global web config pretty easily  Or  in a nutshell  this is working as designed

User · Answer

vs2017 just added in these lines to csproj user file       lt IISExpressAnonymousAuthentication gt enabled lt  IISExpressAnonymousAuthentication gt       lt IISExpressWindowsAuthentication gt enabled lt  IISExpressWindowsAuthentication gt       lt IISExpressUseClassicPipelineMode gt false lt  IISExpressUseClassicPipelineMode gt   with these lines in Web config      lt compilation debug  true  targetFramework  4 5    gt   lt httpRuntime targetFramework  4 5  maxRequestLength  1048576    gt   lt identity impersonate  false    gt   lt authentication mode  Windows    gt   lt authorization gt     lt allow users  yourNTusername    gt     lt deny users       gt   lt  authorization gt      And it worked

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