catalytic liner

Hi, I have a Neff Electric Oven (B14M62N0GB) (https://www.neff-home.com/uk/supportdetail/product/B14M62N0GB/01#/Tabs=section-spareparts/) There is a catalytic liner which sits above the top heater element in the oven which I've just noticed is hanging down. It has a single screw which is...