check 1
 
AmazonPHP\SellingPartner\Configuration Object
(
    [lwaClientID:AmazonPHP\SellingPartner\Configuration:private] => amzn1.application-oa2-client.591a897440174fd0bedd7d0916bbd3a6
    [lwaClientSecret:AmazonPHP\SellingPartner\Configuration:private] => amzn1.oa2-cs.v1.b76d01800e16fbf5df128b331b94784c657c01d93bf695c8dd76ebeb368fa8b0
    [accessKey:AmazonPHP\SellingPartner\Configuration:private] => ASIA3GIR6737EYL4AD63
    [secretKey:AmazonPHP\SellingPartner\Configuration:private] => o8lmHahCoUcTLKBm5kssTlRGVRQJ8518LTelfvTI
    [userAgent:AmazonPHP\SellingPartner\Configuration:private] => Library amazon-php/sp-api-php (language=PHP 8.1.34; Platform=Linux 4.18.0-553.64.1.el8_10.x86_64 x86_64)
    [securityToken:AmazonPHP\SellingPartner\Configuration:private] => FwoGZXIvYXdzEL7//////////wEaDLK2CM0CFmsp7F16eiK5ATTdtoPrpeigruGPfD9qsxaK1Qg7sLsebI/qb/IDf+3RHbzwBKI+DPAz4AZpsQWarNegdKvHOaJvUxcFFdqjCVDUaLkQdPr6BOjEadB0JbhNpBmi0ldWQ3OT0kjrbDoT7cBztg4rpvrRt/zGjaXOC8VTsa4tln5zbsOx5PGKabXhexkH8CAsV3ZR0ZIlmdQXngbbdibGoYlj+7CiLSaNIAy+b6UiVV3eJu04Nv1Xecq2RUpb36CvY9YCKOHhjNEGMi0X3nl9O9Q04cRb9Cq+MCNze/BHLl8EylfKPY168C6QzzOWDMrus175NJbyg+g=
    [tmpFolderPath:AmazonPHP\SellingPartner\Configuration:private] => /tmp
    [loggerConfiguration:AmazonPHP\SellingPartner\Configuration:private] => AmazonPHP\SellingPartner\Configuration\LoggerConfiguration Object
        (
            [defaultLogLevel:AmazonPHP\SellingPartner\Configuration\LoggerConfiguration:private] => debug
            [customLogLevels:AmazonPHP\SellingPartner\Configuration\LoggerConfiguration:private] => Array
                (
                )

            [skippedAPIs:AmazonPHP\SellingPartner\Configuration\LoggerConfiguration:private] => Array
                (
                )

            [skippedAPIOperations:AmazonPHP\SellingPartner\Configuration\LoggerConfiguration:private] => Array
                (
                )

            [skipHttpHeaders:AmazonPHP\SellingPartner\Configuration\LoggerConfiguration:private] => Array
                (
                    [0] => authorization
                    [1] => x-amz-access-token
                    [2] => x-amz-security-token
                    [3] => proxy-authorization
                    [4] => www-authenticate
                    [5] => proxy-authenticate
                )

        )

    [extensions:AmazonPHP\SellingPartner\Configuration:private] => AmazonPHP\SellingPartner\Extensions Object
        (
            [extensions:AmazonPHP\SellingPartner\Extensions:private] => Array
                (
                )

        )

    [sandbox:AmazonPHP\SellingPartner\Configuration:private] => 
)
check 2 
Error: Class "CurlClient" not found