Magento – Fatal error: Cannot instantiate interface

designmagento2

My magento store is throwing this error:

Fatal error: Cannot instantiate interface Magento\Framework\View\Design\Theme\ResolverInterface in /Library/WebServer/Documents/magento/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php on line 73

I don't know why it started to appear. I made no new module installation. The store was working fine.

I've check file permissions and I see no issue there. Also delete the /var/ dir and, I think, all folders/files where created.

[EDIT] The preference is defined vendor/magento/magento2-base/app/etc/di.xml

<preference for="Magento\Framework\View\Design\Theme\ResolverInterface" type="Magento\Theme\Model\Theme\Resolver" />

Best Answer

If you use redis, run:

redis-cli flushall

If you also use an environment like ansible (lxc - server), you'll need to do that command in container. Plus I did the following:

Clear var/generation (or generated/* in newer versions)
Clear var/cache
Check if the module generating the error is enabled and enable it (bin/magento module:enagle Some_Module) or Enable all Magento modules: bin/magento module:enable --all
Compile DI bin/magento setup:di:compile

Related Solutions

Magento – Fatal error: Cannot instantiate interface in Magento 2

I think you have not mentioned the preference in your di.xml. I also faced the same issue when I was creating custom config xml file module.

I got the issue when I called this code:

$testConfig = $this->_objectManager->get('Training\Test\Model\Config\ConfigInterface');
$myNodeInfo = $testConfig->getMyNodeInfo();

Below is the sample code I have added in my di.xml, may be it may help you to get reference:

<preference for="Training\Test\Model\Config\ConfigInterface" type="Training\Test\Model\Config" />

Here I have implemented the interface in Training\Test\Model\Config class and my getMyNodeInfo() method is defined in that Model.

So based on the the preference defined in di.xml the code ->get('Training\Test\Model\Config\ConfigInterface'); will create an object of type Training\Test\Model\Config.

Magento – Fatal error: Uncaught Error: Cannot instantiate abstract class Magento\Framework\Model\ResourceModel\AbstractResource

please replace your consturct code in below file /home1/dukaania/public_html/testing2/app/code/Sugarcode/Test/Model/Total/Fee.php

       public function __construct(
    \Magento\Framework\Model\Context $context,
    \Magento\Framework\Registry $registry,
     \Sugarcode\Test\Model\Total\FeeFactory $feeFactory,
    \Magento\Framework\Model\ResourceModel\AbstractResource $resource= null,
    \Magento\Framework\Data\Collection\AbstractDb $resourceCollection= null,
      array $data = array()
) {
    parent::__construct($context, $registry, $resource, $resourceCollection, 
      $data);
        $this->_feeFactory = $feeFactory;

}

after replacing run command : rm -rf generated/* and clear cache and check

Best Answer

Related Solutions

Magento – Fatal error: Cannot instantiate interface in Magento 2

Magento – Fatal error: Uncaught Error: Cannot instantiate abstract class Magento\Framework\Model\ResourceModel\AbstractResource

Related Topic