HTTP Error 500.19 and error code : 0x80070021

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

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