Fatal error: Uncaught Error: Class 'GuzzleHttp\Cookie\CookieJar' not found in C:\xampp\htdocs\admin\vendor\guzzlehttp\guzzle\src\Cookie\SessionCookieJar.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\guzzlehttp\guzzle\src\Cookie\SessionCookieJar.php on line 8