Twitter Subscriptions

I'm struggling to enable Twitter subscriptions on my personal instance. I've set up a developer account, set TWITTER_KEY and TWITTER_SECRET (I've tried using both the consumer api key/secret and the access token secret/key) but I just get "unknown twitter error." whenever i try to enable Twitter via the sources tab or add a new twitter subscription. Anyone had luck getting this setup and have thoughts on what I may be missing or misconfiguring?