Add user an error

Hello
I use omeka s 2.0.2 and I have an error when I add a new user…
Omeka s said that find an error.
Thanks
Gus

this is the error
Zend\Mail\Transport\Exception\RuntimeException
Unable to send mail: Unknown error

Detalles:

Zend\Mail\Transport\Exception\RuntimeException: Unable to send mail: Unknown error in /var/www/html/vendor/zendframework/zend-mail/src/Transport/Sendmail.php:305 Stack trace: #0 [internal function]: Zend\Mail\Transport\Sendmail->mailHandler(’=?UTF-8?Q?juan?..’, ‘=?UTF-8?Q?Activ…’, ‘\xC2\xA1Saludos!\n\nSe …’, ‘Date: Sun, 08 S…’, ’ -f’gusunavarro…’) #1 /var/www/html/vendor/zendframework/zend-mail/src/Transport/Sendmail.php(135): call_user_func(Array, ‘=?UTF-8?Q?juan?..’, ‘=?UTF-8?Q?Activ…’, ‘\xC2\xA1Saludos!\n\nSe …’, ‘Date: Sun, 08 S…’, ’ -f’gusunavarro…’) #2 /var/www/html/application/src/Stdlib/Mailer.php(86): Zend\Mail\Transport\Sendmail->send(Object(Zend\Mail\Message)) #3 /var/www/html/application/src/Stdlib/Mailer.php(237): Omeka\Stdlib\Mailer->send(Object(Zend\Mail\Message)) #4 /var/www/html/application/src/Controller/Admin/UserController.php(111): Omeka\Stdlib\Mailer->sendUserActivation(Object(Omeka\Entity\User)) #5 /var/www/html/vendor/zendframework/zend-mvc/src/Controller/AbstractActionController.php(78): Omeka\Controller\Admin\UserController->addAction() #6 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Zend\Mvc\Controller\AbstractActionController->onDispatch(Object(Zend\Mvc\MvcEvent)) #7 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(179): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent), Object(Closure)) #8 /var/www/html/vendor/zendframework/zend-mvc/src/Controller/AbstractController.php(106): Zend\EventManager\EventManager->triggerEventUntil(Object(Closure), Object(Zend\Mvc\MvcEvent)) #9 /var/www/html/vendor/zendframework/zend-mvc/src/DispatchListener.php(138): Zend\Mvc\Controller\AbstractController->dispatch(Object(Zend\Http\PhpEnvironment\Request), Object(Zend\Http\PhpEnvironment\Response)) #10 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Zend\Mvc\DispatchListener->onDispatch(Object(Zend\Mvc\MvcEvent)) #11 /var/www/html/vendor/zendframework/zend-eventmanager/src/EventManager.php(179): Zend\EventManager\EventManager->triggerListeners(Object(Zend\Mvc\MvcEvent), Object(Closure)) #12 /var/www/html/vendor/zendframework/zend-mvc/src/Application.php(332): Zend\EventManager\EventManager->triggerEventUntil(Object(Closure), Object(Zend\Mvc\MvcEvent)) #13 /var/www/html/index.php(21): Zend\Mvc\Application->run() #14 {main}

That error is telling you we couldn’t send the user an email to tell them their account exists and let them set their password.

It probably just means your server is not set up to send email.

yes.
I install postfix and now is ok
thanks
gus
www.koluel.org