ASP.NET Core website on Azure fails to start with a 502.5 error after upgrade from .NET Core 1.1.1 to .NET Core 1.1.2

Question

I have a .NET Core web application which I deploy as an Azure Web App.

This has been working perfectly until last night when I applied the Visual Studio 2017 upgrade (v1

Answer 1

We are having the same issue after the Visual Studio 2017 Update.

A workaround is to edit the web.config for your site in Kudu after it has been deployed.

Add --fx-version 1.1.1 at the start of the arguments value for the aspNetCore entry under system.webServer

e.g