名媛直播

I got this Jaboticaba bonsai a little over 2.5 years ago and it has done pretty well until recently. I keep it in my office but have been able to get enough light with indirect light and lamps (measured at about 3000 lux at the branches) to keep it going strong. About 6 months ago I tried my first major structural pruning. The tree seemed to respond well, budded and leafed out prolifically... then suddenly went into a sharp decline, lost all of its leaves, and one major branch completely died. I suspect some sort of pest or disease, but don't know what to do to save the rest of the tree. I've attached a series of pictures with captions. Any advice would be appreciated. I'm a newb - this is my second tree.