Trouble starting Nav Mission

I have disabled the Geo Fence and I have tried Terrain and Verify height with no observable difference.

This problem is now resolved. Two changes made. Not sure which was more critical.
Note that the plan does not show a waypoint numbered as 1. A new plan was made.
The new plan showed Altitude as Absolute. Result was it flew the mission.
It rose to a higher alt for RTL. Very respectable touchdown. Happy Happy.