Mega links are dead. Try this one: APK
I think this is not official, but one guy did the Live2D of Quincy.
First of all, I recomend you Nox App Player instead of Bluestacks.
Personally, I experienced your issue and I solved it installing the full apk.
[Android 4.X / Android 5.0+ ] <-- These are v. 2.3.0, so you have to download a little update. I'm using these apk and it's working fine.