Piwik_Log could not be autoloaded

Hallo,

ich habe ein Problem mit der Installation. Alles lief durch bis zum letzten Punkt. Eigentlich sollte da wohl der Code angezeigt werden, aber statt dessen gab es diese Meldung:

Piwik_Log could not be autoloaded.
Backtrace:

#0 [internal function]: Piwik_Loader::autoload(‘Piwik_Log’)
#1 /srv/www/htdocs/web113/html/piwik/core/Log/APICall.php(20): spl_autoload_call(‘Piwik_Log’)
#2 /srv/www/htdocs/web113/html/piwik/core/Loader.php(63): require_once(’/srv/www/htdocs…’)
#3 [internal function]: Piwik_Loader::autoload(‘Piwik_Log_APICa…’)
#4 /srv/www/htdocs/web113/html/piwik/core/Piwik.php(1530): spl_autoload_call(‘Piwik_Log_APICa…’)
#5 /srv/www/htdocs/web113/html/piwik/plugins/Installation/Controller.php(458): Piwik::createLogObject()
#6 /srv/www/htdocs/web113/html/piwik/plugins/Installation/Controller.php(376): Piwik_Installation_Controller->initObjectsToCallAPI()
#7 /srv/www/htdocs/web113/html/piwik/plugins/Installation/Installation.php(62): Piwik_Installation_Controller->firstWebsiteSetup()
#8 [internal function]: Piwik_Installation->dispatch(Object(Piwik_Event_Notification))
#9 /srv/www/htdocs/web113/html/piwik/libs/Event/Dispatcher.php(213): call_user_func_array(Array, Array)
#10 /srv/www/htdocs/web113/html/piwik/core/PluginsManager.php(362): Event_Dispatcher->addObserver(Array, ‘FrontController…’)
#11 /srv/www/htdocs/web113/html/piwik/core/PluginsManager.php(248): Piwik_PluginsManager->addPluginObservers(Object(Piwik_Installation))
#12 /srv/www/htdocs/web113/html/piwik/core/PluginsManager.php(165): Piwik_PluginsManager->loadPlugins()
#13 /srv/www/htdocs/web113/html/piwik/core/FrontController.php(209): Piwik_PluginsManager->setPluginsToLoad(Array)
#14 /srv/www/htdocs/web113/html/piwik/index.php(103): Piwik_FrontController->init()
#15 {main}

Hat jemand eine Idee, was ich tun könnte?

Gruß
Ralf