Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraints\Existence" not found in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/validator/Constraints/Optional.php:20
Stack trace:
#0 {main}
thrown in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/validator/Constraints/Optional.php on line 20