BlueStacks 4 is natively based on Android 7.1.2. The offline installer does not force you into the Android 9 environment. If you have an APK that crashes on launch in BlueStacks 5, the answer is almost always to revert to the BlueStacks 4 offline installer.
The offline installer is a (typically 450–500 MB) that contains all the Android emulation files. It doesn’t download additional components during installation. BlueStacks 4 itself is an older major version (latest update ~2021), based on Android 7.1.2 (Nougat) or Android 4.4 KitKat. bluestacks 4 offline installer better
The standard BlueStacks download from the official website is a lightweight .exe file (roughly 2-5 MB). When you run it, it does nothing but connect to a CDN to download the rest of the program. This requires: BlueStacks 4 is natively based on Android 7