Entities to Areas

Hi, I really hope someone can help, this is driving me mad. Fairly new HA user but have configured a lot. However, I cannot, whatever I do, get entities to show under an area. If I list all the entities in settings I can see them all assigned to areas. The devices are assigned to areas. But, if I go to an Area setting it says “There are no entities linked to this area.”. I absolutely cannot fix it, tried everything I can think of (apart from start adding manual config in the file which seems not required really). Also I noticed that if I try and switch the ‘use device area’ to disabled and hit update, it doesnt save. It is just shown as enabled again. Driving me mad now as I cannot use Area cards to show controls. Thanks, Paul.