Window dividers have slipped out
I pride myself on being able to fix many things, but the inside of window that's probably gas sealed isn't one of them (maybe someone else here can chime in with some window magic). 

Replacing the window package I could do; fix your window, not so much.

If you can get the window out of the frame and take it somewhere, it'd be cheaper but you're most likely going to have to board up the window for quite some time while it's in the shop.

Ordering a new  one and having it on hand for a swap out would be ideal. I'd have an eye on the other windows too, though. How soon until they go; consider having a complete new install on the dining room package.