Fatal error: Uncaught Error: Class "GuzzleHttp\Psr7\Stream" not found in D:\xampp\htdocs\SSWPOS\vendor\guzzlehttp\psr7\tests\ReadSeekOnlyStream.php:10 Stack trace: #0 {main} thrown in D:\xampp\htdocs\SSWPOS\vendor\guzzlehttp\psr7\tests\ReadSeekOnlyStream.php on line 10