Cannot run functions any more in VisualStudio 17.12.1

[rwb196884]

Description

I have an Azure Functions project that was working.

I updated VisualStudio to get .net9 and now it won't run any more when I click the 'play' button.

It says: System.InvalidOperationException: 'Configuration is missing the 'HostEndpoint' information. Please ensure an entry with the key 'Functions:Worker:HostEndpoint' is present in your configuration.'

Is there a fix for this?

Steps to reproduce

Open previously working Azure Functions solution.
Click play.

[rwb196884]

Example: CannotRunAzureFunctions.zip

[kshyju]

I downloaded your sample project and successfully ran it in F5 debug mode after adding a local.settings.json file to the project root. For reference, I'm using Visual Studio version 17.12.3.

When you try, what version of core tools and functions runtime are you seeing in your terminal? I have 4.0.6610 as core tools version.