As a general rule, you can use both on the bottom of the air fryer if the basket sits on top.  Using aluminium foil or baking paper in the basket technically can be done as long as it’s weighed down by the food however it’s not recommended because an air fryer works by providing a constant air flow around the cooking cavity and if you have it blocked by something like aluminium foil, or baking paper, the foods will be cooked less even, or even cook slower.