Solution:1
Order your code at this way:
add_action(‘admin_menu’, ‘vc_add_theme_settings_pages’);
add_action(‘admin_head’, ‘theme_styles’);
add_action(‘admin_init’, ‘vc_add_theme_settings_page’);
function vc_add_theme_settings_page(){
add_theme_page(‘Theme Settings’,’Theme Settings’, ‘edit_theme_options’, ‘manage_options’, ‘vc_theme_page_display’ );
}
and try change
<?php do_settings_sections(‘vc_theme_page’); ?>
for
<?php do_settings_sections(__FILE__); ?>