Fatal error: Uncaught Error: Interface "Psr\EventDispatcher\StoppableEventInterface" not found in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/event-dispatcher-contracts/Event.php:31
Stack trace:
#0 {main}
thrown in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/event-dispatcher-contracts/Event.php on line 31