WordPress Theme: Standalone theme need index.php file ERROR

Question

I suddenly got got an error when coding - wordpress -> theme:

I don't understand why this is the case as I have an index.php page. Also the css stylesheet is there as well. style.css also has the following commented

style.css

Theme Name: samirTheme
Author: samir
Author URI: www.wordpress.com
Version: 1.0
Description: This is a cool theme
Template: Test1

Here is the folder structure

New to wordpress. So confused as to why the theme is broken and not showing up in wordpress. Any ideas?

Answer 1

SOLUTION The solution way actually very simple. I found that it was really hard to find a good resource for the answer so I am answering here.

The style.css was missing: template: theme in the commented header i.e.

/*
 Theme Name:   samirTheme
 Theme URI:    http://example.com/twenty-fifteen-child/
 Description:  Twenty Fifteen Child Theme
 Author:       John Doe
 Author URI:   http://example.com
 Template:     twentyfifteen <--------------------------------------------
 Version:      1.0.0
 License:      GNU General Public License v2 or later
 License URI:  http://www.gnu.org/licenses/gpl-2.0.html
 Tags:         light, dark, two-columns, right-sidebar, responsive-layout, accessibility-ready
 Text Domain:  twenty-fifteen-child
*/