Fatal error: Uncaught Error: Class 'WPMailSMTP\Vendor\Aws\Crypto\MaterialsProvider' not found in /home/ursatac/public_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 /home/ursatac/public_html/wp-content/plugins/wp-mail-smtp-pro/vendor_prefixed/aws/aws-sdk-php/src/Crypto/KmsMaterialsProvider.php on line 16