macOS Catalina introduced a new privacy permission for Screen Recording. Bartender 3 requires this permission to take a snapshot of your menu bar — that's how Bartender works to manage and rearrange menu bar items.
Bartender uses Screen Recording to take a photo of your menu bar. This is necessary for Bartender to know which menu bar items are currently displayed and to manage them. The screen recording is only of the menu bar area and is not stored or sent anywhere.
We recommend upgrading to the latest version of Bartender for the best experience with the latest macOS versions.