Fatal error: Uncaught Error: Call to undefined function wp_should_skip_block_supports_serialization() in /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/block-supports/elements.php:101 Stack trace: #0 /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/class-wp-hook.php(309): wp_render_elements_support_styles(NULL, Array) #1 /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/plugin.php(191): WP_Hook->apply_filters(NULL, Array) #2 /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/blocks.php(855): apply_filters('pre_render_bloc...', NULL, Array, NULL) #3 /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/blocks.php(795): render_block(Array) #4 /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/formatting.php(3874): excerpt_remove_blocks('<!-- wp:tadv/cl...') #5 /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/class-wp-hook.php(307): wp_trim_excerpt('<!-- wp:tadv/cl...', Object(WP_Post)) #6 /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/plugin.php(191): WP_Hook->apply_filters('', Array) #7 /homepages/21/d134 in /homepages/21/d13464440/htdocs/fewo2_wp/wp-includes/block-supports/elements.php on line 101