My Mavic Air drone was working prefectly fine before updating to .400, now i'm getting a Gimbal Overloaded error message on the screen and the Gimbal will not move up or down.

Please try to restart the drone and refresh the latest firmware via DJI Assistant 2. If the issue persists, I would suggest sending the drone in for diagnosis. Please contact our support for a further help: http://www.dji.com/support