I am using the DJI RC remote. Every time I try to download the aircraft firmware I get the following message "Server error. Wait a moment and try again (Error code: -4)" I've had the DJI mini 3 for a couple of weeks and I was able to download all of the varieties of firmware when I first got it. I am currently able to check for updates to the controller firmware without issue. I've tried connecting through two different WIFI networks without success.