Fatal error: Uncaught Symfony\Component\Filesystem\Exception\IOException: Unable to write to the "/var/www/prestashop/var/cache/dev" directory. in /var/www/prestashop/vendor/symfony/symfony/src/Symfony/Component/Filesystem/Filesystem.php:681 Stack trace: #0 /var/www/prestashop/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCache.php(124): Symfony\Component\Filesystem\Filesystem->dumpFile('/var/www/presta...', '<?php\n\nuse Symf...') #1 /var/www/prestashop/src/Adapter/ContainerBuilder.php(179): Symfony\Component\Config\ResourceCheckerConfigCache->write('<?php\n\nuse Symf...', Array) #2 /var/www/prestashop/src/Adapter/ContainerBuilder.php(127): PrestaShop\PrestaShop\Adapter\ContainerBuilder->compileContainer() #3 /var/www/prestashop/src/Adapter/ContainerBuilder.php(93): PrestaShop\PrestaShop\Adapter\ContainerBuilder->buildContainer('front') #4 /var/www/prestashop/classes/controller/FrontController.php(1968): PrestaShop\PrestaShop\Adapter\ContainerBuilder::getContainer('front', true) #5 /var/www/pre in /var/www/prestashop/vendor/symfony/symfony/src/Symfony/Component/Filesystem/Filesystem.php on line 681