Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "_wp_theme_json_webfonts_handler" not found or invalid function name in /home/www/xn--klistermrke-h9a.dk/wp-includes/class-wp-hook.php:310 Stack trace: #0 /home/www/xn--klistermrke-h9a.dk/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array) #1 /home/www/xn--klistermrke-h9a.dk/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /home/www/xn--klistermrke-h9a.dk/wp-settings.php(495): do_action('plugins_loaded') #3 /home/www/xn--klistermrke-h9a.dk/wp-config.php(109): require_once('/home/www/xn--k...') #4 /home/www/xn--klistermrke-h9a.dk/wp-load.php(50): require_once('/home/www/xn--k...') #5 /home/www/xn--klistermrke-h9a.dk/wp-blog-header.php(13): require_once('/home/www/xn--k...') #6 /home/www/xn--klistermrke-h9a.dk/index.php(17): require('/home/www/xn--k...') #7 {main} thrown in /home/www/xn--klistermrke-h9a.dk/wp-includes/class-wp-hook.php on line 310