Fatal error: Uncaught Error: Class 'Concrete\Core\Block\BlockController' not found in /home/pynchc/public_html/DEV/Old/concrete/blocks/next_previous/controller.php:9 Stack trace: #0 {main} thrown in /home/pynchc/public_html/DEV/Old/concrete/blocks/next_previous/controller.php on line 9