Federation Issues - No protocol handlers?

I've seen a couple of these over the past few weeks, looks like something changed, possibly on MS side. I haven't bothered to test it on my own though, nor have I seen a solution being mentioned anywhere.

If you do feel like wasting more time on this, here are few things to test. First, try configuring the RPT outside of AAD Connect, as that seems to be the common denominator in all similar threads I've seen. If nothing changes, enable trace logging on the AD FS server and check one failure event, hopefully it will spill out the actual issue. A Fiddler trace wouldn't hurt either.