Fatal error: Uncaught Magento\Framework\Exception\FileSystemException: The "env.php" deployment config file isn't writable. in /var/www/dev/magento2/vendor/magento/framework/App/DeploymentConfig/Writer.php:148 Stack trace: #0 /var/www/dev/magento2/vendor/magento/framework/App/Cache/State.php(104): Magento\Framework\App\DeploymentConfig\Writer->saveConfig(Array) #1 /var/www/dev/magento2/vendor/magento/framework/App/Cache/Manager.php(77): Magento\Framework\App\Cache\State->persist() #2 /var/www/dev/magento2/vendor/magento/framework/App/ObjectManager/Environment/Compiled.php(121): Magento\Framework\App\Cache\Manager->setEnabled(Array, true) #3 /var/www/dev/magento2/vendor/magento/framework/App/ObjectManagerFactory.php(191): Magento\Framework\App\ObjectManager\Environment\Compiled->configureObjectManager(Object(Magento\Framework\Interception\ObjectManager\Config\Compiled), Array) #4 /var/www/dev/magento2/vendor/magento/framework/App/Bootstrap.php(211): Magento\Framework\App\ObjectManagerFactory->create(Array) #5 /var/www/dev/ in /var/www/dev/magento2/vendor/magento/framework/App/DeploymentConfig/Writer.php on line 148