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

Information:

error message: Unable to load cache resource 'cronjobs-24'
error code: 0
file: /www/htdocs/w00c74d1/koordinate/wcf/lib/system/cache/CacheHandler.class.php (214)
php version: 5.6.40-nmm9
wcf version: 1.0.11 pl 3 (Horizon)
date: Sat, 29 Jun 2024 07:43:51 +0000
request: /koordinate/index.php?page=User&s=546857e04dbf7659ea65466130a960ced4f5c80e&userID=1
referer:

Stacktrace:

#0 /www/htdocs/w00c74d1/koordinate/wcf/lib/system/cache/CacheHandler.class.php(196): CacheHandler->loadCacheFile(Array)
#1 /www/htdocs/w00c74d1/koordinate/wcf/lib/system/cache/CacheHandler.class.php(155): CacheHandler->load(Array)
#2 /www/htdocs/w00c74d1/koordinate/lib/system/WBBCore.class.php(47): CacheHandler->get('cronjobs-24', 'nextExec')
#3 /www/htdocs/w00c74d1/koordinate/lib/system/WBBCore.class.php(34): WBBCore->initCronjobs()
#4 /www/htdocs/w00c74d1/koordinate/wcf/lib/system/WCF.class.php(93): WBBCore->initTPL()
#5 /www/htdocs/w00c74d1/koordinate/global.php(18): WCF->__construct()
#6 /www/htdocs/w00c74d1/koordinate/index.php(7): require_once('/www/htdocs/w00...')
#7 {main}