Well that’s too bad. I hope I am not uncovering another issue but have you created an account in Dji fly and been able to bind the drone? I hope so.
I would suggest you call DJI Support and see what they offer.
I didn't think that was drone-specific - they all use the same software; I am under the impression that all DJI UAVs sign out after (I wanna say) a month or so.
You'll need to check this from other members and manuals etc, but I have a distinct feeling I have read that any obstacle encountered during a waypoint mission results in brake and discontinuation of the mission. I don't think Bypass is available...