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 …
While we don't have a specific time frame, our team is reviewing channels 24/7. In the meantime, we recommend uploading more original content on your channel, as more content to review, the better. Appreciate your patience in the meantime.