Fatal error: Uncaught Error: Class 'WP_Block' not found in /mnt/web304/c3/21/59079521/htdocs/WordPress_SecureMode_01/wp-includes/blocks.php:718 Stack trace: #0 /mnt/web304/c3/21/59079521/htdocs/WordPress_SecureMode_01/wp-includes/blocks.php(617): render_block(Array) #1 /mnt/web304/c3/21/59079521/htdocs/WordPress_SecureMode_01/wp-includes/formatting.php(3816): excerpt_remove_blocks('