I'm very new to blender and I'm learning how to model a chair with blender guru's tutorial. All seem fine til I realized there's a tiny hole when I apply the subdivider surface and I have no idea how to remove it. I've tried creating loop cuts, removing the edge and some other stuff. Can someone help me? I'll be attaching pictures. Thanks
The rest of the screenshots are here https://i.stack.imgur.com/o47jY.jpg

