Does anyone know how the placements are going to work for act 4? Will they go off the rank you finish as in Act 3 or will it go off of your act rank, or something else all together. Any help would be great, thank you.

I've been playing ranked with my friend for almost a week now and just today I got this. Anyone know why it just suddenly wouldn't let me play ranked ​ https://preview.redd.it/s0uktdnibdc61.png?width=1300&format=png&auto=webp&s=9b0...