I have create the observer when the customer is register to get notification to admin

 <event name="customer_register_success">
    <observer name="sendmail_toadmin" instance="Namespace\Module \Observer\SendMailToAdmin"/>

Observer path is app/code/Namespace/Module/Observer/SendMailToAdmin

namespace Namespace\Module\Observer;

use Magento\Framework\Event\ObserverInterface;

class SendMailToAdmin implements ObserverInterface

const XML_PATH_EMAIL_RECIPIENT = 'trans_email/ident_general/email';
protected $_transportBuilder;
protected $inlineTranslation;
protected $scopeConfig;
protected $storeManager;
protected $_escaper;

public function __construct(
    \Magento\Framework\Mail\Template\TransportBuilder $transportBuilder,
    \Magento\Framework\Translate\Inline\StateInterface $inlineTranslation,
    \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
    \Magento\Store\Model\StoreManagerInterface $storeManager,
    \Magento\Framework\Escaper $escaper
) {
    $this->_transportBuilder = $transportBuilder;
    $this->inlineTranslation = $inlineTranslation;
    $this->scopeConfig = $scopeConfig;
    $this->storeManager = $storeManager;
    $this->_escaper = $escaper;

public function execute(\Magento\Framework\Event\Observer $observer)

    $customer = $observer->getData('customer');

        $error = false;

        $sender = [
            'name' => $this->_escaper->escapeHtml($customer->getFirstName()),
            'email' => $this->_escaper->escapeHtml($customer->getEmail()),
        $postObject = new \Magento\Framework\DataObject();
        $storeScope = \Magento\Store\Model\ScopeInterface::SCOPE_STORE; 
        $transport = 
            ->setTemplateIdentifier('1') // Send the ID of Email template which is created in Admin panel
                ['area' => \Magento\Framework\App\Area::AREA_FRONTEND, // using frontend area to get the template file
                'store' => \Magento\Store\Model\Store::DEFAULT_STORE_ID,]
            ->setTemplateVars(['data' => $postObject])
            ->addTo($this->scopeConfig->getValue(self::XML_PATH_EMAIL_RECIPIENT, $storeScope))
        $transport->sendMessage(); ;

    catch (\Exception $e) 


I got the error

we cant save the customer

please help me

  • Are you sure the observer is firing ? @Magento – Prathap Gunasekaran Aug 27 '19 at 6:31
  • When i click on create account it display message We can't save the customer..when i remove the observer then it work properly – Magento Aug 27 '19 at 6:36
  • setTemplateIdentifier('1') provide a valid identifier – Prathap Gunasekaran Aug 27 '19 at 7:04

This is just a guess, but maybe the problem is the space in your events.xml file?

It should be: Namespace\Module\Observer\SendMailToAdmin

instead of: Namespace\Module \Observer\SendMailToAdmin

<event name="customer_register_success">
    <observer name="sendmail_toadmin" instance="Namespace\Module\Observer\SendMailToAdmin"/> 

At first, I think it's just a typo when you write down your question, but your code work fine for me until I also copy that space into my code, then I can replicate the very same error message you described.

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