Here is the shape itself, just so you have a general reference
I created it with a path tool, but it ended up being two shapes, regardless, they seem to have identical points, the join function doesn't work on either corner
My actual issue is this - when attempting to fill in the shape, regardless of whether I group it or not, there is a hole in it.
I've tried joining, but it doesn't seem to work. Pathfinder creates a path along the same non-existent "edge" that gets filled out with fill.
What can I do to properly consolidate the shape?