Doesn't work with full screen style apk installer (android 9)

[TheMispeled]

Title. Device is Redmi 6 cereus, MIUI 11.0.4

Replaced Package installer (ver 9-[random numbers]) with a generic android 9 google package installer apk (ver 9) from apkmirror, no difference. Also tried ver 9-7126274, still getting fullscreen style package manager.