Apple TestFlight upload warning ITMS-90191: missing `beta-reports-active` entitlement

Question

When I upload a build to the new Apple owned and iTunes Connect-integrated TestFlight, I see the following log:

WARNING ITMS-90191: "Missing beta en

Answer 1

Manually editing the plist file didn't do it for me.
Editing an existing profile and generating the file also did NOT work this time.
But, just like for joehl, creating a brand NEW provision profile actually fixed it for me. So, create an all new Provision Profile and and you will be back in business. This looks like a glitch in TestFlight.