Hi, thank you for reaching DJI Forum. We do apologize if you are having issues with your aircraft. The R&D department has confirmed that this issue is caused by the firmware error and will be fixed in the next firmware version. I'd like to ask if this warning appears when the aircraft is not flying in the Simulator mode. If not, the aircraft can be used normally. Thank you.

It is a known bug in the current firmware version and will be fixed by DJI in the next version. You are safe to fly, the message only pops up randomly.