 Listen, you get cracks in walls typically around windows because it's a weaker part of the wall structure, and usually they'll start at an upper corner and sort of radiate out. Same thing happens with doors. So I wouldn't panic over this, but what I would do is I would repair it using a mesh fiberglass tape. So you're going to want to sort of sand it a little bit to make sure you're getting the surface nice and smooth and pulling out any dirt that's there. It's a light sanding technique.