Broken child theme – template is missing

New site I’m building with Origami theme version 1.5.12: http://www.sing4mysupper.com. I’m trying to create a child theme before I begin customization of the site, but am getting “Broken theme – template is missing” messages over and over again. I’ve created child themes before without trouble, but I can’t get to the bottom of this.

Things I’ve tried:
1. Read through everything I could find in the forums.
2. Deleted all child theme related files and started from scratch.
3. Re-read the Codex for creating child themes in case I was spacing out on a step/re-watched video tutorials for the same reason.

None of those helped.

Here is the style.css I created for the child theme:

/*
 Theme Name:     Origami Child
 Theme URI:      http://siteorigin.com/theme/origami
 Description:    Origami Child Theme
 Author:         Janie Christensen
 Template:       origami
 Version:        1.5.12
*/
@import url("../origami/style.css");

In the Origami theme there is a regular “style.css” file as well as one called “editor-style.css” and one called “flexslider.css” — should I create @import lines for those as well? Could that be where my problem lies? Thank you!