Extension for Visual Studio - Allows you to access your web applications from other machines such as iOS and Android devices, even if the web application is hosted on the development web server. Receiving a 404 on Web API calls until restarting Visual Studio for Mac. Rodrigo Fraga Olvera reported at 07:12 PM. MacOS 10.15 +.NET Core 3 AspNet Web Api = dotnet quit. You can use the Publish tool to publish ASP.NET Core apps to Azure App Service.