vision system error

I have an Air 2 and using the DJI Fly app. Since a couple of days I have a down arrow next to the Vision System Status icon in the DJI Fly app. The icon is the one below: I also noted the the drone is flying much slower than before, like if it would be on some 'safe mode'. Can anyone explain...

So I am on my second Mavic Pro now, and have been keeping a good record of flights and distances ect. The first one went down on a cold day with some wind - put it down to adverse conditions. The insurance covered it but rain water had destroyed the craft and we never got to the bottom of the...

Just purchased a new Mavic Pro a couple of weeks ago and have had nothing but problems. Controller give the message "SYS WARNING CHECK APP" and I have done all that has been recommended, including switching to iOS, uninstalling and reinstalling, changing devices, upgrading and downgrading, etc...