Thank you for reporting this issue. Would you be able to attach your DXdiag and your project log files to this post? Also, what version of UE4 are you currently using to package your project?
Any additional information would be greatly appreciated.
Have you attempted to uninstall and then reinstall the SDK? it is a possibility that something in the SDK failed to build correctly and may just have to be reinstalled.
It is still in experimental stages so it may not work. I would highly recommend what the fix that Josh Adams has linked in that post to fix the issue. There are also a couple of photos from users that may help you with your issue.
Hey, Josh. I tried to install TADP 3.0 and it works! Strange, because it sets the same env variables as I did manually before. I guess that pure SDK doesn’t work, only Eclipse bundle does. But I don’t think I will experiment because everything works now.