Android 10 App Installer with KIO4Install not working

Maybe some would like to test this APK to install an APK (testAPK.apk , 3MB / AI2) (which is in the assets or can be downloaded from Google Drive and is copied into the ASD).
(ASD = app-specific directory)
installAPK.apk (7.9 MB)

So check this especially on Android 9 and 10.

Blocks

screenshot