Fatal error: Uncaught Error: Class "UAParser\AbstractParser" not found in C:\xampp\htdocs\hannoole\PMS\vendor\ua-parser\uap-php\src\OperatingSystemParser.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\PMS\vendor\ua-parser\uap-php\src\OperatingSystemParser.php on line 15