Fatal error: Uncaught Error: Call to undefined function filter_block_content() in /var/www/shopup.dk/myom/wp-includes/formatting.php:5226 Stack trace: #0 /var/www/shopup.dk/myom/wp-includes/class-wp-hook.php(341): wp_pre_kses_block_attributes('Blocksy', Array, Array) #1 /var/www/shopup.dk/myom/wp-includes/plugin.php(205): WP_Hook->apply_filters('Blocksy', Array) #2 /var/www/shopup.dk/myom/wp-includes/kses.php(1159): apply_filters('pre_kses', 'Blocksy', Array, Array) #3 /var/www/shopup.dk/myom/wp-includes/kses.php(965): wp_kses_hook('Blocksy', Array, Array) #4 /var/www/shopup.dk/myom/wp-includes/class-wp-theme.php(969): wp_kses('Blocksy', Array) #5 /var/www/shopup.dk/myom/wp-includes/class-wp-theme.php(901): WP_Theme->sanitize_header('Name', 'Blocksy') #6 /var/www/shopup.dk/myom/wp-content/plugins/blocksy-companion/plugin.php(247): WP_Theme->get('Name') #7 /var/www/shopup.dk/myom/wp-content/plugins/blocksy-companion/plugin.php(221): Blocksy\Plugin->check_if_blocksy_is_activated() #8 /var/www/shopup.dk/myom/wp-content/plugins/blocksy-companion/plugin.php(62): Blocksy\Plugin->__construct() #9 /var/www/shopup.dk/myom/wp-content/plugins/blocksy-companion/plugin.php(483): Blocksy\Plugin::instance() #10 /var/www/shopup.dk/myom/wp-content/plugins/blocksy-companion/blocksy-companion.php(103): require('/var/www/shopup...') #11 /var/www/shopup.dk/myom/wp-settings.php(589): include_once('/var/www/shopup...') #12 /var/www/shopup.dk/myom/wp-config.php(109): require_once('/var/www/shopup...') #13 /var/www/shopup.dk/myom/wp-load.php(50): require_once('/var/www/shopup...') #14 /var/www/shopup.dk/myom/wp-blog-header.php(13): require_once('/var/www/shopup...') #15 /var/www/shopup.dk/myom/index.php(17): require('/var/www/shopup...') #16 {main} thrown in /var/www/shopup.dk/myom/wp-includes/formatting.php on line 5226