Fatal error: Uncaught Error: Class "ArcWebBlocks\Block" not found in /home/trpdev/public_html/vendor/arena-racing-company/arc-web-blocks/WhatsOnCalendar/WhatsOnCalendar.php:20 Stack trace: #0 {main} thrown in /home/trpdev/public_html/vendor/arena-racing-company/arc-web-blocks/WhatsOnCalendar/WhatsOnCalendar.php on line 20