Laravel 5.2 无法打开 laravel.log

我知道关于这个话题有很多问题，但我的问题真的很奇怪，这就是我决定发帖的原因.

  [Tue Mar 01 07:26:51.435312 2016] [:error] [pid 8837] [client 127.0.0.1:37843] PHP Fatal error:  Uncaught exception 'UnexpectedValueException' with message 'The stream or file "/var/www/personale/librarie-cor/storage/logs/laravel.log" could not be opened: 
failed to open stream: Permission denied' in /var/www/personale/librarie-cor/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php:87\nStack trace:
\n#0 /var/www/personale/librarie-cor/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(37): Monolog\\Handler\\StreamHandler->write(Array)
\n#1 /var/www/personale/librarie-cor/vendor/monolog/monolog/src/Monolog/Logger.php(289): Monolog\\Handler\\AbstractProcessingHandler->handle(Array)
\n#2 /var/www/personale/librarie-cor/vendor/monolog/monolog/src/Monolog/Logger.php(565): Monolog\\Logger->addRecord(400, Object(Symfony\\Component\\Debug\\Exception\\FatalErrorException), Array)
\n#3 /var/www/personale/librarie-cor/vendor/laravel/framework/src/Illuminate/Log/Writer.php(202): Monolog\\Logger->error(Object(Symfony\\Component\\Debug\\Exception\\FatalErrorException), Array)
\n#4 /var/www/personale/librarie-cor in /var/www/personale/librarie-cor/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php on line 87

问题是我已经做了chmod -R 777 storage/次，这里是一个截图:

我怎样才能消除这个错误？