Update: YouTube is back and working again for the large majority of people! If you're still seeing an issue, it should be fixed soon.https://twitter.com/TeamYouTube/status/1135271882985312256 …
Thanks for reaching out. When your channel is suspended, an email will be sent to you with the reason of termination. If you believe it's an error you can always appeal. Here's more info about channel termination: http://yt.be/help/GSbT . Hope this helps.