Fatal error: Uncaught Error: Class "Psr\Log\AbstractLogger" not found in C:\Users\Administrator\Desktop\xamp\htdocs\sdk\guzzlehttp\guzzle\tests\TestLogger.php:12 Stack trace: #0 {main} thrown in C:\Users\Administrator\Desktop\xamp\htdocs\sdk\guzzlehttp\guzzle\tests\TestLogger.php on line 12