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 …
Also, we noticed that you shared your email address publicly to help with your issue. Since emails are often considered private information we would recommend deleting your tweet. (2/2)