As far as I know the game now only supports android 7+ or 9+ not 5. Anyways, always remove original game first and install signed apk if you have installation issues.
Yeah I'm on Android 7 but x32. I've already used your previous apks and it always worked to install them over the existing one(s) but not this time.
It seems like there was an issue with the root of Nox itself. I've re-rooted the emu and now it works again, weird.
Anyway, thanks for all of your work!