Fatal error: Uncaught Error: Class 'Cron\AbstractField' not found in /home/rijschoolmk/xibo.rijschool-mk.be/vendor/mtdowling/cron-expression/src/Cron/HoursField.php:11 Stack trace: #0 {main} thrown in /home/rijschoolmk/xibo.rijschool-mk.be/vendor/mtdowling/cron-expression/src/Cron/HoursField.php on line 11