Because you are running Android 4.2.2, you cannot use the latest APKPure app. You need an older version (e.g., version 1.x or early 2.x).
He went into the dusty settings menu, toggled "Unknown Sources," and felt a small thrill of rebellion. The Installation
This usually indicates conflicting duplicate files or insufficient storage space.
Android 4.2.2 blocks the installation of applications downloaded outside of the official Google Play Store by default. You must toggle a specific system setting to allow external installations. Open the app on your Android 4.2.2 device.