OW Debug - Exception: Message: Could not instantiate mail function. File: /public_html/ow_libraries/php_mailer/class.phpmailer.php Line: {$line_number_here}
Common cause: php mail() function/phpmailer library is not installed/enabled/configured on your server
Known to happen after: any process that requires mail sending ( mass mailing, user registration and etc).
Solution: install/enable php mail()/phpmailer library on server side. Contact your host to get assistance.