Fatal error: Uncaught Error: Interface 'WPMailSMTP\ConnectionInterface' not found in /var/www/sweves.se/httpdocs/wp-content/plugins/wp-mail-smtp/src/AbstractConnection.php:12 Stack trace: #0 {main} thrown in /var/www/sweves.se/httpdocs/wp-content/plugins/wp-mail-smtp/src/AbstractConnection.php on line 12