Same site (UEFA.com) gives different answers:-
Optimists - Open UEFA.com, hit the orange Europa League icon at the top, select Teams, and you’ll see Crystal Palace in the top row. If you had hit the green Conference League icon at the top, you would have seen Nottingham Forest.
Pessimists - Open UEFA.com, select the All Competitions dropdown. This sends you to a large menu. On the left hand side is a large button saying UEFA rankings. Select this. Select Access List (men’s) from the options at the top. There is a dropdown where you choose the competition. If you select UEFA Europa League, you will see Nottingham Forest at the top of the page. If you select UEFA Conference League, you will see Crystal Palace.