Fatal error: Uncaught Error: Call to undefined function wp_is_block_theme() in /homepages/15/d527524819/htdocs/wp-includes/script-loader.php:2362 Stack trace: #0 /homepages/15/d527524819/htdocs/wp-includes/class-wp-hook.php(307): wp_enqueue_global_styles('') #1 /homepages/15/d527524819/htdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #2 /homepages/15/d527524819/htdocs/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #3 /homepages/15/d527524819/htdocs/wp-includes/script-loader.php(2156): do_action('wp_enqueue_scri...') #4 /homepages/15/d527524819/htdocs/wp-includes/class-wp-hook.php(307): wp_enqueue_scripts('') #5 /homepages/15/d527524819/htdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #6 /homepages/15/d527524819/htdocs/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #7 /homepages/15/d527524819/htdocs/wp-includes/general-template.php(3015): do_action('wp_head') #8 /homepages/15/d527524819/htdocs/wp-content/themes/ark/header.php(7): wp_head() #9 /home in /homepages/15/d527524819/htdocs/wp-includes/script-loader.php on line 2362