You should have received an email with more details about the monetization tab being disabled. If you haven't received one, you can try this troubleshooter to know what happened and the next steps: https://yt.be/help/d8W5 . Tweet us back if needed.
-
-
-
This Tweet is unavailable.
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.