The Subscriptions feed error message is resolved for almost everyone. If you're still seeing it, know that it will be fixed soon – thanks for your continued patience! You can follow along here for any additional updates: https://yt.be/help/CBxM https://twitter.com/TeamYouTube/status/1119013035580878848 …
Appreciate the screenshot. Looks like your channel is still in review. We understand it's taking longer to process all the applications as we're reviewing every request manually. We're on track to roll out the final decisions. Hopefully you won't have to wait much longer.