Dashed lines breaking up geometry on rounded edges and shapes

Hi,
I am following the tutorial “Rounded Cube with Native Tools - Skill Builder by SketchUp” but when I arch the edges it is all broken up by these dashed lines. This was happening to me with a chair as well. In the video, his edges are all round and one face.
How can I change this?
Thanks!

You have Hidden Geometry turned on so the softened edges between the faces are being displayed. In them off in the View menu.

Thank you so much!