Fatal error: Uncaught Error: Class "GuzzleHttp\Cookie\CookieJar" not found in C:\Apache24\htdocs\cms_upgrade\vendor\guzzlehttp\guzzle\src\Cookie\SessionCookieJar.php:7 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\guzzlehttp\guzzle\src\Cookie\SessionCookieJar.php on line 7