An exception occured while bootstrapping the application.

cache_dir must be a directory
Stack Trace:
#0 /usr/share/pear/ZendFramework-1.10.2/library/Zend/Cache/Backend/File.php(154): Zend_Cache::throwException('cache_dir must ...')
#1 /usr/share/pear/ZendFramework-1.10.2/library/Zend/Cache/Backend/File.php(121): Zend_Cache_Backend_File->setCacheDir('/tmp/cache')
#2 /usr/share/pear/ZendFramework-1.10.2/library/Zend/Cache.php(152): Zend_Cache_Backend_File->__construct(Array)
#3 /usr/share/pear/ZendFramework-1.10.2/library/Zend/Cache.php(93): Zend_Cache::_makeBackend('File', Array, false, false)
#4 /opt/data/home/nesteggr/haven/phatinvestor/investgame/app/bootstrap.php(92): Zend_Cache::factory('Core', 'File', Array, Array)
#5 /opt/data/home/nesteggr/haven/phatinvestor/investgame/htdocs/index.php(29): require_once('/opt/data/home/...')
#6 {main}