It saves the image of falsing and people are on the street outside of the green zone consistently
Are you able to trigger a recording by walking through the ground zone based on the rules parameters?
Try adjusting the sensitivity and test for resolution.
Should it still fail, completely delete the rule. Wait 5 minutes then re-create the rule. Wait an additional 5 minutes for the rule to be sent to the camera, then test for functionality. Any Change?
Make sure you are following best practices for creating VA rules for the VDB770 as well, they can be found below: