[Solved] Edge split isn't fixing the bottom of a skirt

Hi everyone!

I'm working on a dress and have weird shadows along the bottom edge. Normally, I can use edge split, as explained in UN's tutorial, to get rid of them. However, when I tried to edge split, the shadows didn't go away. In fact, I think they got stronger?

Here is the blend and the package file.

Thanks for looking and also for any insights you have! The content posted on this forum, in addition to the personalized help I've received, has really helped me reach new heights with CC creation. You all are amazing!