In this article I will provide solution to the error in Visual Studio: HTTP Error 500.31 - Failed to load ASP.NET Core runtime.
 
 

Error

Server Error in ‘ASP.Net’ Application
 
HTTP Error 500.31 - Failed to load ASP.NET Core runtime
 
Common solutions to this issue:
The specified version of Microsoft.NetCore.App or Microsoft.AspNetCore.App was not found.
 
Troubleshooting steps:
Check the system event log for error messages
Enable logging the application process' stdout messages
Attach a debugger to the application process and inspect
 
[Solved] HTTP Error 500.31 - Failed to load ASP.NET Core runtime
 
 

Cause

The cause of this error is missing .Net 3.0 runtime.
 
 

Solution

You will need to download and install the missing .Net 3.0 runtime from the following link.
Download .Net 3.1 runtime
 
Steps
1. Visit the link Download .Net 3.1 runtime.
2. Click on the Hosting Bundle link shown below.
[Solved] HTTP Error 500.31 - Failed to load ASP.NET Core runtime
 
3. Once downloaded, close all Visual Studio and install the setup file.
[Solved] HTTP Error 500.31 - Failed to load ASP.NET Core runtime
 
4. Once installed, open Visual Studio and run the project.