Are you trying to or install a tweak ?
It is strongly recommended to only modify files within /var and avoid changing files in the root / directory unless you are experienced. Frequently Asked Questions Filza Escaped 12.x
The app uses an exploit that may cause the device to reboot or respring upon launching. This is normal; simply try opening it again. Are you trying to or install a tweak
Compatible with newer devices (iPhone XR/XS/XS Max) on iOS 12.0–12.1.2. This is normal; simply try opening it again
This specific "12.x" version is designed only for iOS 12. Other versions of FilzaEscaped exist for iOS 14-16. If you'd like more specific information, let me know: Which iPhone model are you using?
Modifying system files without knowledge can lead to a broken system (bootloop), requiring a restore.
Edit system files to change app icons, user interface elements, or carrier text.