RuntimeException: Can't create directory /var/www/html/var/generation/Magento/Catalog/Model/ResourceModel/Product/. in /var/www/html/vendor/magento/framework/Code/Generator.php:115
Stack trace:
#0 /var/www/html/vendor/magento/framework/Code/Generator/Autoloader.php(35): Magento\Framework\Code\Generator->generateClass('Magento\\Catalog...')
#1 [internal function]: Magento\Framework\Code\Generator\Autoloader->load('Magento\\Catalog...')
#2 [internal function]: spl_autoload_call('Magento\\Catalog...')
#3 /var/www/html/vendor/magento/framework/ObjectManager/Relations/Runtime.php(38): class_exists('Magento\\Catalog...')
#4 /var/www/html/vendor/magento/framework/Interception/Config/Config.php(153): Magento\Framework\ObjectManager\Relations\Runtime->has('Magento\\Catalog...')
#5 /var/www/html/vendor/magento/framework/Interception/Config/Config.php(147): Magento\Framework\Interception\Config\Config->_inheritInterception('Magento\\Catalog...')
#6 /var/www/html/vendor/magento/framework/Interception/Config/Config.php(176): Magento\Framework\Interception\Config\Config->_inheritInterception('Magento\\Catalog...')
#7 /var/www/html/vendor/magento/framework/Interception/Config/Config.php(127): Magento\Framework\Interception\Config\Config->hasPlugins('Magento\\Catalog...')
#8 /var/www/html/vendor/magento/framework/Interception/Config/Config.php(103): Magento\Framework\Interception\Config\Config->initialize(Array)
#9 /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(93): Magento\Framework\Interception\Config\Config->__construct(Object(Magento\Framework\ObjectManager\Config\Reader\Dom\Proxy), Object(Magento\Framework\Config\Scope), Object(Magento\Framework\App\Cache\Type\Config), Object(Magento\Framework\ObjectManager\Relations\Runtime), Object(Magento\Framework\Interception\ObjectManager\Config\Developer), Object(Magento\Framework\ObjectManager\Definition\Runtime), 'interception')
#10 /var/www/html/vendor/magento/framework/ObjectManager/Factory/Dynamic/Developer.php(89): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Framewo...', Array)
#11 /var/www/html/vendor/magento/framework/ObjectManager/ObjectManager.php(71): Magento\Framework\ObjectManager\Factory\Dynamic\Developer->create('Magento\\Framewo...')
#12 /var/www/html/vendor/magento/framework/App/ObjectManager/Environment/Developer.php(82): Magento\Framework\ObjectManager\ObjectManager->get('Magento\\Framewo...')
#13 /var/www/html/vendor/magento/framework/App/ObjectManagerFactory.php(194): Magento\Framework\App\ObjectManager\Environment\Developer->configureObjectManager(Object(Magento\Framework\Interception\ObjectManager\Config\Developer), Array)
#14 /var/www/html/vendor/magento/framework/App/Bootstrap.php(385): Magento\Framework\App\ObjectManagerFactory->create(Array)
#15 /var/www/html/vendor/magento/framework/App/Bootstrap.php(232): Magento\Framework\App\Bootstrap->initObjectManager()
#16 /var/www/html/index.php(38): Magento\Framework\App\Bootstrap->createApplication('Magento\\Framewo...')
#17 {main}