In solving a Rubik's cube, I've been following the standard beginner instructions. I'm now trying to get the "yellow cross" step done (on the blue side, because I started with solving green), but I think the cube might be in an invalid state. Instead of having 0, 2, or 4 edges of the cross, I can only get an odd number of edges (currently 1, but I while ago it had 3). Here's what the blue side looks like right now:
Is this solvable?
For reference, here's the other side: