Quad going into LAND mode while in AUTO mode. "Err: EKF_CHECK-2, Err: FAILSAFE_EKF-1" error

Hi everyone.

I'm somewhat new at DIY Drones ;-)

A few day ago I test making my first "Flight Plan" and all went fine. The next day I made a slightly longer Flight Plan. During one of the legs between two way points the Quad went into LAND mode. I took

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