Attributes cannot be chosen anymore

Attributes cannot be chosen anymore

hi there,

my shop worked fine until a few days ago. but now, users cannot choose attributes anymore. for example here: http://www.dv1879.ch/index.php?option=com_jshopping&controller=product&task=view&category_id=3&product_id=19&Itemid=104

The attributes "Variante 1..." are simply written there instead of being a dropdown-box.

Any hints?

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Aw: Attributes cannot be chosen anymore

After update?

Enable debug mode joomla - see error.