Fatal error: Uncaught Error: Class "WPMailSMTP\Vendor\Aws\Crypto\MaterialsProvider" not found in /var/www/html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/Crypto/KmsMaterialsProvider.php:16 Stack trace: #0 {main} thrown in /var/www/html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/Crypto/KmsMaterialsProvider.php on line 16