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Fatal error: Uncaught Error: Call to undefined function WC() in /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra-child/template-parts/header/header-main-layout.php:16 Stack trace: #0 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template.php(772): require() #1 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template.php(716): load_template() #2 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/general-template.php(204): locate_template() #3 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra/inc/template-parts.php(245): get_template_part() #4 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/class-wp-hook.php(307): astra_masthead_primary_template() #5 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters() #6 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/plugin.php(474): WP_Hook->do_action() #7 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra/inc/core/theme-hooks.php(159): do_action() #8 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra/inc/markup-extras.php(660): astra_masthead() #9 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/class-wp-hook.php(307): astra_header_markup() #10 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters() #11 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/plugin.php(474): WP_Hook->do_action() #12 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra/inc/core/theme-hooks.php(145): do_action() #13 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra/header.php(56): astra_header() #14 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template.php(770): require_once('...') #15 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template.php(716): load_template() #16 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/general-template.php(48): locate_template() #17 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra/404.php(15): get_header() #18 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template-loader.php(106): include('...') #19 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-blog-header.php(19): require_once('...') #20 /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/index.php(17): require('...') #21 {main} thrown in /mnt/web113/a0/17/510782717/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/astra-child/template-parts/header/header-main-layout.php on line 16