Fatal error: Uncaught Error: Class 'Symfony\Requirements\RequirementCollection' not found in /home/devilinf/maitres-couvreurs.fr/web_pool/marne-vitry-le-francois/vendor/symfony/requirements-checker/src/ProjectRequirements.php:21 Stack trace: #0 {main} thrown in /home/devilinf/maitres-couvreurs.fr/web_pool/marne-vitry-le-francois/vendor/symfony/requirements-checker/src/ProjectRequirements.php on line 21