This happened gradually over time, but...it really doesnt have leaves left. They just turn yellow, dry up, and fall off. The canes are still green.
It is in bark, with lava rock on the bottom. I water it maybe every ten days? It is in an east window. Its flowering. The flowers are ugly, but that's a different issue. What's wrong with it?
First picture is what it looked like a month ago. The rest are from today.