ERROR MESSAGE: Missing index.php—Child Theme

You are missing part of the boilerplate needed in the comments area at the top of the stylesheet file. You need a line that says:

Template: [name of parent theme folder]

For example if the folder in the /wp-content/themes folder for the parent theme is integrative-wisdom you would have:

/*!
Theme Name: Integrative Wisdom Child
Theme URI: http://underscores.me/
Author: Drew Lettner after Tony Klose
Author URI: http://underscores.me/
Template: integrative-wisdom
Description: Description
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: integrative-wisdom
*/