Fatal error: Uncaught Error: Class 'WPMailSMTP\Providers\MailerAbstract' not found in E:\www\web\wp-content\plugins\wp-mail-smtp\src\Providers\Gmail\Mailer.php:18
Stack trace:
#0 {main}
thrown in E:\www\web\wp-content\plugins\wp-mail-smtp\src\Providers\Gmail\Mailer.php on line 18