Php Symfony 2 InvalidArgumentException:文件app/config/config_prod.yml不存在

我正在尝试访问运行CentOS的VPS上的Symfony安装

服务器上存在文件/app/config/config_dev.yml和/app/config/config_prod_yml。为了测试的目的，我甚至把它们打到了0777，但我仍然得到了它们不存在的错误

完整跟踪：

InvalidArgumentException: The file "/home/XXXXX/public_html/app/config/config_dev.yml" does not exist.

in /home/XXXXX/public_html/app/cache/dev/classes.php line 3637
at FileLocator->locate() in /home/XXXXX/public_html/app/cache/dev/classes.php line 4524
at FileLocator->locate() in /home/XXXXX/public_html/vendor/symfony/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php line 40
at YamlFileLoader->load() in /home/XXXXX/public_html/vendor/symfony/src/Symfony/Component/Config/Loader/DelegatingLoader.php line 52
at DelegatingLoader->load() in /home/XXXXX/public_html/app/AppKernel.php line 39
at AppKernel->registerContainerConfiguration() in /home/XXXXX/public_html/app/bootstrap.php.cache line 867
at Kernel->buildContainer() in /home/XXXXX/public_html/app/bootstrap.php.cache line 783
at Kernel->initializeContainer() in /home/XXXXX/public_html/app/bootstrap.php.cache line 517
at Kernel->boot() in /home/XXXXX/public_html/app/bootstrap.php.cache line 548
at Kernel->handle() in /home/XXXXX/public_html/web/app_dev.php line 28

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这是一个CHMOD问题，PHP无法访问symfony核心文件。

此命令的输出是什么：“ls-l/home/XXXXX/public\u html/app/config/config\u dev.yml”？@Cyprian-rw-r--r--1根根目录486 Oct 6 16:48/home/XXXXX/public\u html/app/config/config\u dev.yml