“Mission Interrupted - Flight mode was changed”
Here is a quote from “vico” from another topic:
“vico” (post #7)
Topic:
The error “The flight mode was changed” happens when for at least 3 seconds Litchi detected that the drone is no longer in JOYSTICK mode (shown in middle of top bar). In order to control the drone, it must be in JOYSTICK mode. Most likely Litchi switched it to JOYSTICK mode and the drone switched back to GPS or other, and did not stay in JOYSTICK for some reason.
It could be for example due to a no fly zone (check Geo Zone Map - Fly Safe - DJI 1), or the mobile device being very laggy, there may be other reasons too