Fatal error: Uncaught Error: Class "GuzzleHttp\Cookie\CookieJar" not found in I:\www\oauth2\auth_server\vendor\guzzlehttp\guzzle\src\Cookie\FileCookieJar.php:10 Stack trace: #0 {main} thrown in I:\www\oauth2\auth_server\vendor\guzzlehttp\guzzle\src\Cookie\FileCookieJar.php on line 10