ASP.NET Core returns StatusCode:500

ASP.NET Core returns StatusCode:500http://developers.de/blogs/holger_vetter/archive/2016/11/10/asp-net-core-returns-statuscode-500.aspxI ported an MVC WEB API project to ASP.NET Core and now the Service just returned StatusCode: 500 every time I called it. Visual Studio doesn't give me any information or Exception to indicate what happened. To find the error I disabled "EnableenCommunityServer 2008 SP1 (Build: 30619.63)