Fatal error: Uncaught Error: Class 'WPMailSMTP\Vendor\ParagonIE\ConstantTime\Base64' not found in C:\wamp64\www\wordpress\wp-content\upgrade-temp-backup\plugins\wp-mail-smtp\vendor_prefixed\paragonie\constant_time_encoding\src\Base64UrlSafe.php:35 Stack trace: #0 {main} thrown in C:\wamp64\www\wordpress\wp-content\upgrade-temp-backup\plugins\wp-mail-smtp\vendor_prefixed\paragonie\constant_time_encoding\src\Base64UrlSafe.php on line 35