Catchable fatal error: Argument 1 passed to SessionFGB::setProductCategory() must be an instance of ProductCategory, null given, called in /home/inkoopshop/domains/excelsiorplein.nl/public_html/pages/ShopPageHome.php on line 10 and defined in /home/inkoopshop/domains/excelsiorplein.nl/public_html/lib/SessionFGB.php on line 28