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 … Read more