Error Message befor Installation - Joomla! Forum - community, help and support

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hi experts,

after 2 times of deleting files server, downloading joomla 2.5.8 , new installation, message again , again, when want install joomla via www.localhost.com...

fatal error: class 'jlanguagehelper' not found in /home/omqfjnni/htdocs/installation/includes/application.php on line 138

also installed file "installation" several times new...

any hints, why?

regards

marc

uploading & overwriting files (except /installation/ folder) on server files of original joomla distribution right thing do...

could make sure file & folder permissions correct?
files: 644
folders: 755





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