Fatal error: Uncaught Error: Class 'GuzzleHttp\Cookie\CookieJar' not found in D:\xampp\htdocs\psp\backend\vendor\guzzlehttp\guzzle\src\Cookie\FileCookieJar.php:10 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\guzzlehttp\guzzle\src\Cookie\FileCookieJar.php on line 10