HTTP Error 500.19 and error code : 0x80070021
I got this error while trying to host a WCF service in an empty ASP.NET application. The whole solution was using .NET 4.5 platform, on IIS 8.5 running on Windows 8.1. The gotcha was to
Open up "Turn Windows Features on or off"
Go to WCF section under ASP.NET 4.5 advanced services
Check HTTP Activation.
You'll be asked to restart the system.
This should Fix the HTTP 500.19!
EDIT 11-FEB-2016 Just got an issue on Windows 10 Pro, IIS 10, This time, it was an HTTP 404.0. The fix is still the same, turn on "HTTP Activation" under Windows Features -> .NET Framework 4.6 Advanced Services -> WCF Services -> HTTP Activation
Got precisely the same error and came to this question. As @SpaceBison mentioned in comments, this answer describes the solution - https://stackoverflow.com/a/12867753/404099. I spotted it too late and it misses some steps. This is what worked for me:
Windows Server 2012, IIS 8.5. Should work for other versions too.
- Go to server manager, click add roles and features
- In the roles section choose: Web Server
- Under Security sub-section choose everything (I excluded digest, IP restrictions and URL authorization as we don't use them)
- Under Application Development choose .NET Extensibility 4.5, ASP.NET 4.5 and both ISAPI entries
- In the features section choose: NET 3.5, .NET 4.5, ASP.NET 4.5
- In the web server section choose: Web Server (all), Management Tools (IIS Management Console and Management Service), Windows Authentication - if you are using any of it