unable to takeoff

Hello, I just got a brand new NANO+ from autelpilot.com. And it will not take off. When I try the takeoff sequence the rotors spin up for a second then stop. I get no errors or alerts. I tried emailing Autel and autelpilot with no answers. The firmwares say up to date. Any help would be greatly...

My company has been using the Max 4T since February with no issues. We updated it to the 1.2.8.237 3-5 days ago. We’re on a project with it. We can pair the drone to the controller. But when we go to take off, the props will turn like it’s going to take off for a few seconds, but will stop...