Solving ASP.NET Core running on Azure App Service causing 500.30 ANCM In-Process Start Failure

This article provides a detailed guide on resolving the 500.30 ANCM In-Process Start Failure error when deploying ASP.NET Core applications to Azure App Service. It explains common causes like missing ASP.NET Core shared framework versions or Azure Key Vault permission issues. The author demonstrates using Kudu (the SCM site) to debug the issue by launching the app via the debug console, which reveals a more specific error message. The example shows an unhandled exception related to an empty Key Vault configuration value, helping developers pinpoint and fix configuration problems. This is a technical troubleshooting guide relevant to IT/technology professionals working with Azure and ASP.NET Core.