Great Hall area Field Guide Pages

Can anyone please help me find the last field guide page in the Great Hall area? It says I only have 23 out of the 24 for that area. I have used online guides and visited every single one of the page locations multiple times. It seems that I have collected them all but it still says Im missing one.. More Info Here: https://questionsanswersonline.com/gr... #HogwartsLegacy