Sorry, I already readded all the subscriptions. I only have the default log level set, so I wasn't expecting much info there.
When I went to the subs page, it displayed the same message of no items for both playlists and subscriptions, I've never put in any playlists, but the message was displayed for both. When I readded the subs, they showed up properly, both on the left column and the subs list. One anomaly to note is that even though adding the sub closes the add sub popup, the new sub doesn't show in the list until the browser is refreshed.
At the moment I'm getting the 429 too many requests, so I've shut down the container until tomorrow, I'll post back. Prior to shutting down I added a cookie and a youtube API key and the 429's continued, but I don't know if that makes a difference once the 429 is already happening.