The owned packs count is garbage: 1052770304
The "Unable to connect to the marketplace" error happened cause I started Minecraft on my laptop when it was already open on my desktop. That is not what I am reporting. What I am reporting is the garbage owned packs count. It looks like a null pointer is being dereferenced.

Edit: Derp, it's not a null pointer dereference, it's a pointer that should have been set to null being dereferenced.