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June 11, 2013 at 10:50 am #2425
How did you install the plugin? From the admin or via FTP? This error happens because the plugin is trying to update the CSS file with what is in the DB and fails due to permissions issue. Check that eshop-shipping-extension/includes/css/USC_eShop_Shipping.css exists and is writable by the web server. If it doesn’t exist, make sure that the directory is writable.