VS 2017 cant attach to Unity 2018

Unity 2018.2.1f1 personal and VS Enterprise 2017 v. 15.7.5 with VSTU

When I press “Attach to Unity” in VS an error pops up:


I think this started when I downloaded Unity 2018, but don’t hold me to that.
Our entire team is on 2018 now and I cannot go back to 2017.

I have tried uninstalling/reinstalling VSTU from the VS Installer program and from the extensions add/update screen in VS.
I’ve tried reinstalling VS and re-adding VSTU.

Nothing seems to work.
I can’t even use the normal “Attach to process” option as attaching to unity.exe and/or unityHelper.exe processes doesn’t break on breakpoints.

If it helps anyone, I finally got this working again by reinstalling VS 2017 a 2nd time. This time I included VSTU in the original VS Installer package.