Fatal error: Uncaught Error: Class "Negotiation\AbstractNegotiator" not found in C:\xampp\htdocs\BK\bateriasec\vendor\willdurand\negotiation\src\Negotiation\CharsetNegotiator.php:5 Stack trace: #0 {main} thrown in C:\xampp\htdocs\BK\bateriasec\vendor\willdurand\negotiation\src\Negotiation\CharsetNegotiator.php on line 5