I think I just had a similar incident. I paid my 25 points to refill me energy bar before new day hits. The popup window appeared, but was blank unlike usual. So I refreshed it. It didn't pop up again, however my refill icon showed that I now have 55 minutes before I can get a refill again. However, my energy bar was not refilled. I went and refreshed a few other windows, but still never got my refill to train it.