Fatal error: Uncaught Error: Interface 'Negotiation\NegotiatorInterface' not found in /home/lafaamicps/www/symfony/vendor/willdurand/negotiation/src/Negotiation/Negotiator.php:8 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/willdurand/negotiation/src/Negotiation/Negotiator.php on line 8