I finally got it to extrude by turning on profiles, after opening “edit sketch.”
You are showing me things I didn’t realize that can happen. We get used to our “worlds” of protected workspaces and don’t know how to behave in the real life situation.
Not sure what you are trying to do but once I created the body, that extra image is gone on my program.
Edit: That extra image is gone as soon as you click on showing profiles: