Fatal error: Uncaught Error: Interface 'WPMailSMTP\Vendor\Psr\Http\Message\RequestInterface' not found in C:\wamp64\www\wordpress\wp-content\upgrade-temp-backup\plugins\wp-mail-smtp\vendor_prefixed\psr\http-message\src\ServerRequestInterface.php:43 Stack trace: #0 {main} thrown in C:\wamp64\www\wordpress\wp-content\upgrade-temp-backup\plugins\wp-mail-smtp\vendor_prefixed\psr\http-message\src\ServerRequestInterface.php on line 43