Unable to fly in Position Mode No local position

I tried flying in position more indoor using optical flow without gps, but i keep getting no local position error and couldnt figure out whats causing this.

here is my flight log. thanks in advance.

Flow can not provide a global position which is what position mode requires.

What flow sensors are you using?

i am using hex hereflow

That will not give a position local or otherwise. It can give you altitude from the lidar but that is not a position.