BugBot’s free tier included with Cursor Pro gives you a limited number of reviews total, not per month. Looks like that limit has already been used up, so new requests aren’t going through.
BugBot Pro ($40/month) is a separate add-on. The Upgrade button starts a 14-day free trial. If you decide you don’t need it, you can cancel before the trial ends and you won’t be charged. To do that: cursor.com/dashboard > Manage Subscription > Cancel subscription. You’ll keep access until the trial ends.