Fatal error: Uncaught ErrorException: Warning: file_get_contents(/var/www/html/pimcore/var/cache/dev/UrlMatcher.php.meta): failed to open stream: Too many open files in /var/www/html/pimcore/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCache.php:156 Stack trace: #0 /var/www/html/pimcore/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCache.php(85): Symfony\Component\Config\ResourceCheckerConfigCache->safelyUnserialize('/var/www/html/p...') #1 /var/www/html/pimcore/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php(42): Symfony\Component\Config\ResourceCheckerConfigCache->isFresh() #2 /var/www/html/pimcore/vendor/symfony/symfony/src/Symfony/Component/Routing/Router.php(320): Symfony\Component\Config\ResourceCheckerConfigCacheFactory->cache('/var/www/html/p...', Object(Closure)) #3 /var/www/html/pimcore/vendor/symfony/symfony/src/Symfony/Component/Routing/Router.php(268): Symfony\Component\Routing\Router->getMatcher() #4 /var/www/htm in /var/www/html/pimcore/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/StrictSessionHandler.php on line 59