Scroll back to versions like v22.1 or v18.1 .
On Android 4.4.2, the installation process is not straightforward: download magisk manager for android 4.4.2
(API level 21). Magisk Manager cannot run on Android 4.4.2 because the underlying root system and module framework depend on features that don't exist in KitKat. Scroll back to versions like v22