Problems making a light cone

I’m trying to complete this tutorial:
Tutorial

But when I get to 4:48 inside the video, something went wrong. Once I have laid the texture on the cone, it has a strong black line on the perimeter, and the circle at the bottom. I can not delete these without gaps occurring in the cone, it does not happen in the video. What can I do wrong?

Lampeeksperiment.skp (391.1 KB)

View > Edge Style > Profiles (uncheck)

1 Like

Turn off profiles in the style edge settings.

Very simple when you know it. Thank you so much for the tip to you both.