HTTP Error 500.24 - Internal Server Error : system.web/identity@impersonate is set to true

Question

I created an ASP.NET web application MVC Core 2.2 project. Then I ran it in IIS Express. But I received the following error:

HTTP Error 500.24 - Inter

Answer 1

Clearly not the poster's problem, since he wrote he fixed it changing .NET Core version; but I'm posting what worked for me, just in case.

Open IIS and find your default website:

Then you have two alternatives; the first is the quickest.

1. Authentication

Click on the Authentication icon:

Right-click ASP.NET Impersonation and disable it.

2. Configuration editor

Open the configuration editor:

The configuration editor opens; click the drop-down to the top left and pick system.web/identity:

Set impersonate to false:

And you're good to go!

Answer 2

I received the same error as OP. My solution was to add a Web.config file to my ASP.NET Core web app's root folder with this XML content:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>  
    <system.web>
      <identity impersonate="false"/>
    </system.web>
</configuration>

Answer 3

Something is wrong with your setup. "windowsAuthentication": true shouldn't be there. It's set to false by default, unless you are trying to set and use Windows Authentication. Setting up Windows Authentication requires special steps, including having a web.config file with forwardWindowsAuthToken="True" and .UseIISIntegration() in program.cs file. If you are not trying to do that, just set "windowsAuthentication": false.