Magento 2 Installation Error – Magento 2 Installation Fatal Error: Cannot Instantiate Interface

installationmagento-2.1

I have installed a fresh Magento 2.1 over the command line and always get the same fatal error when trying to access the frontend or backend.

Fatal error: Uncaught Error: Cannot instantiate interface Magento\Framework\App\Config\Scope\ReaderPoolInterface

Anyone experienced the same? I have found some resources but with no real help.

Update
I have deleted var/di and var/generation and set it to developer mode

Fatal error: Uncaught Error: Cannot instantiate interface Magento\Framework\App\Config\Scope\ReaderPoolInterface in /shop/build/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php:73 Stack trace: #0 
/shop/build/vendor/magento/framework/ObjectManager/ObjectManager.php(71): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Framewo...') #1 
/shop/build/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(126): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Framewo...') #2 
/shop/build/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(53): Magento\Framework\ObjectManager\Factory\AbstractFactory->resolveArgument(Array, 'Magento\\Framewo...', NULL, 'readerPool', 'Magento\\Framewo...') #3 
/shop/build/vendor/magento/framework/ObjectManager/Factory/Dynamic/Develo in /shop/build/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php on line 73

Best Answer

If you use nginx configuration from the official sample and running Magento in the default/developer mode this situation might happen with document root global value set as 

root $MAGE_ROOT/pub;

The issue can be fixed by setting Magento root from pub directory to the root index.php

root $MAGE_ROOT;

In case of Apache the DocumentRoot value change might also fix the situation. Hope it will help.

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