View file StuffPost/stuffpost/functions.php

<?php

//basic settings
  require get_template_directory().'/functions/function-basic.php';

//global functions
  require get_template_directory().'/parts/sections.php';
  require get_template_directory().'/parts/items.php';

//fonts, styles & script implement
  require get_template_directory().'/functions/function-enqueue.php';

//metadata
  require get_template_directory().'/functions/function-metadata.php';

//sidebars
  require get_template_directory().'/functions/function-sidebar.php';

  //TGM
  require get_template_directory().'/functions/class-tgm-plugin-activation.php';
  require get_template_directory().'/functions/tgm-required.php';

// CUSTOMIZER
if ( ! function_exists( 'weart_customizer' ) ) :
function weart_customizer( $wp_customize ) {

  //Home Settings
  require_once( get_parent_theme_file_path( '/functions/customizer/panel-home.php') );

  //Basic
   require_once( get_parent_theme_file_path( '/functions/customizer/panel-basic.php') );

  //Banner
   require_once( get_parent_theme_file_path( '/functions/customizer/panel-banner.php') );

  //Article
   require_once( get_parent_theme_file_path( '/functions/customizer/panel-article.php') );

  //Colors
   require_once( get_parent_theme_file_path( '/functions/customizer/panel-colors.php') );

  //Sanitize, Validation
  require_once( get_parent_theme_file_path( '/functions/customizer/sanitize.php') );

} endif;
add_action( 'customize_register', 'weart_customizer' );
//EXECUTE THE CUSTUMIZER COLOR CHANGES
 require get_template_directory().'/functions/customizer/colors-to-css-inject.php';