Nothing's wrong with the map, it loaded just fine for me.
The transition between blu spawn area and the first point area forces blu players to the left. I think you should add another route down by where the train runs.
The second point is kind of hidden -- you should move it somewhere so that it's easier to find. While you should add signs anyway, they shouldn't be used as a band-aid for an unintuitive design. It's also a small enclosed space with only one entrance so it will be very easy to defend and difficult to capture.
Another thing I'd do is vary the widths of the doorways. You use the same dimensions throughout the map, and a LOT of them. This made the transition between A and B slightly confusing for me.
Other than that, it looks like a great start!