Fatal error: Uncaught Error: Class 'Negotiation\Negotiator' not found in /home/users/00/3c/21/home/www/vendor/friendsofsymfony/rest-bundle/Negotiation/FormatNegotiator.php:25 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/friendsofsymfony/rest-bundle/Negotiation/FormatNegotiator.php on line 25