"I went through and completely uninstalled, used the Adobe Cleaner, rebooted, and reinstalled.
I'm on the latest version available from Adobe Creative Cloud desktop app.
I've tried this with a pre-existing .Proj and a brand new completely empty project with a sequence and Black Video."
I just went through one more time. I've obsessively rebooted after every step. I deleted any Adobe related files, including the hard to delete due to file locking CoreSync.dll on the system and I'm reinstalling now.