How to fix error "ANCM In-Process Handler Load Failure"?

Question

I'm setting up the first site in IIS on Windows Server 2016 Standard. This is a NET Core 2.2 application. I cannot get the site to show.

I am getting this error:

HTTP Error 500.0 - ANCM In-Process Handler Load Failure

What can I change to clear this error and get my site to display?

My application is a dll.

I tested my application on the server through the Command Prompt with

dotnet ./MyApp.dll 

it displays in the browser but only on the server itself with (localhost:5001/).

Using this method the site cannot be accessed from any other server. When I set up the site through IIS, I get the In-Process error both on the server and from servers attempting to access the site.

At first I was receiving the Out-Process error. Something I read said to add this (hostingModel="inprocess") to my web.config so I did but now I receive the In-Process error.

The site works fine when installed on my development server.

The Event Viewer shows this error for "IIS AspNetCore Module V2":

Failed to start application '/LM/W3SVC/2/ROOT', ErrorCode '0x8000ffff'.

This is my web.config:

<?xml version="1.0" encoding="utf-8"?>     <configuration>   <system.web>     <customErrors mode="RemoteOnly"></customErrors>         <identity impersonate="false" password="****" userName="****" />   </system.web>   <system.webServer>     <handlers>       <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />     </handlers>     <aspNetCore processPath="dotnet" arguments=".\MyApp.dll" stdoutLogEnabled="false" hostingModel="inprocess" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false">       <environmentVariables />     </aspNetCore>   </system.webServer> </configuration> 

Answer 1

I had the same issue in .Net core 2.2. When I replace

web.config:

<handlers>     <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" /> </handlers> 

to

<handlers>     <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" /> </handlers> 

then it works fine.

Note: The same solution also works for .Net core 2.2 and other upper versions as well.