Fatal error: Unable to load cache resource 'cronjobs-24'

Information:

error message: Unable to load cache resource 'cronjobs-24'
error code: 0
file: /home/www/forum/upload/wcf/lib/system/cache/CacheHandler.class.php (214)
php version: 5.3.28
wcf version: 1.0.11 pl 3 (Horizon)
date: Sun, 29 May 2016 11:21:11 +0000
request: /forum/upload/index.php?page=User&userID=20
referer:

Stacktrace:

#0 /home/www/forum/upload/wcf/lib/system/cache/CacheHandler.class.php(196): CacheHandler->loadCacheFile(Array)
#1 /home/www/forum/upload/wcf/lib/system/cache/CacheHandler.class.php(155): CacheHandler->load(Array)
#2 /home/www/forum/upload/lib/system/WBBCore.class.php(47): CacheHandler->get('cronjobs-24', 'nextExec')
#3 /home/www/forum/upload/lib/system/WBBCore.class.php(34): WBBCore->initCronjobs()
#4 /home/www/forum/upload/wcf/lib/system/WCF.class.php(93): WBBCore->initTPL()
#5 /home/www/forum/upload/global.php(18): WCF->__construct()
#6 /home/www/forum/upload/index.php(7): require_once('/home/www/forum...')
#7 {main}