I already made the left arm and now I'm making the right arm. I got the left arm to work. I just had to move one of my loft profiles to the other side to make the right arm. Now it says loft operation failed to complete, but doesn't explain why it failed. I used the same sketches in the left arm as I did in the right arm. I just had to move sketch 11 to the other side of the part.

it shows up exactly how I want it in the preview.