Site Medien - Joomla! Forum - community, help and support

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hallo
ich bin neu bei joomla!. beim ausprobieren hsbe ich die site: medien geöffnet. sie öffnete nicht vollständig, der banner, das horizomtale menue und der bereich "datei hochladen" fehlte.
es wurde folgende fehlermeldung angezeigt:

fatal error: call member function authorize() on non-object in c:\xampp\htdocs\joomla\administrator\components\com_media\views\media\tmpl\default.php on line 64

der dazugehörige script der zeile 64 lautet:

<?php $canupload= ($this->user->authorize('com_media', 'upload')); ?>

was kann ich tun um die site medien korrekt darzustellen.
mit freundlichem gruss
wolfgang






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