Uncaught Error: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "html_header" not found or invalid function name
in /home/cwdev/public_html/wp-includes/class-wp-hook.php on line 324

Call stack:

1. WP_Hook::apply_filters(NULL, array)
   wp-includes/class-wp-hook.php:348
2. WP_Hook::do_action(array)
   wp-includes/plugin.php:517
3. do_action('wp_head')
   wp-includes/general-template.php:3192
4. wp_head()
   wp-content/themes/politicalcartoons/template/part/header/header-global.php:27
5. require('/home/cwdev/public_h...er/header-global.php')
   wp-includes/template.php:812
6. load_template('/home/cwdev/public_h...er/header-global.php', false, array)
   wp-includes/template.php:745
7. locate_template(array, true, false, array)
   wp-includes/general-template.php:206
8. get_template_part('template/part/header/header', 'global')
   wp-content/plugins/cci/lib/util.php:636
9. get_custom_template_part('template/part/header/header', 'global', 'header')
   wp-content/plugins/cci/lib/util.php:585
10. get_header_custom('global')
    wp-content/themes/politicalcartoons/template/part/header/header-default.php:1
11. require('/home/cwdev/public_h...r/header-default.php')
    wp-includes/template.php:812
12. load_template('/home/cwdev/public_h...r/header-default.php', false, array)
    wp-includes/template.php:745
13. locate_template(array, true, false, array)
    wp-includes/general-template.php:206
14. get_template_part('template/part/header/header', 'default')
    wp-content/themes/politicalcartoons/header.php:14
15. require_once('/home/cwdev/public_h...lcartoons/header.php')
    wp-includes/template.php:810
16. load_template('/home/cwdev/public_h...lcartoons/header.php', true, array)
    wp-includes/template.php:745
17. locate_template(array, true, true, array)
    wp-includes/general-template.php:48
18. get_header()
    wp-content/themes/politicalcartoons/single-ccic_product.php:15
19. include('/home/cwdev/public_h...gle-ccic_product.php')
    wp-includes/template-loader.php:106
20. require_once('/home/cwdev/public_h.../template-loader.php')
    wp-blog-header.php:19
21. require('/home/cwdev/public_html/wp-blog-header.php')
    index.php:17