Error message while listing products.

Hello,

listing of products is on the way here - thx to Nicolas .

However on my page "Summer Sale" http://shop.buch-comptoir.de/index.php/summer-sale.html I receive the following error message:

Warning: is_file() [function.is-file]: open_basedir restriction in effect. File(/media/com_hikashop/upload/ic_strandbuch1.jpg) is not within the allowed path(s): (/var/www/vhosts/buch-comptoir.de/subdomains/shop/httpdocs/:/tmp/) in /var/www/vhosts/buch-comptoir.de/subdomains/shop/httpdocs/libraries/joomla/filesystem/file.php on line 367

Last action I did before it appeared was changing to a subcategory (i.e. "summer sale" - books) - which is as a matter of fact essential to have in this page.

[Deleting both Caches in Joomla DID NOT solve the problem].

Thx in advance for your help.

M.