The installation of hack games on PS4 requires attention. Please refer to the following post for viewing the method for your device jailbreak:
Installable Visual Guide and Step-by-Step Exploit FW5.05
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Install the game:
1) Unzip all the downloaded files using the latest version of winrar.
2) The extracted pkg file is then transferred to your USB drive. Make sure it's not copied to any subfolders in your external drive, but only in the root directory of the external drive.
3) Connect your external drive to your PS4. Since debugging is enabled after the jailbreak, go to the Debug Settings section in the settings menu of the console.
4) In the Debug Settings -> Game -> Package Installer, you'll find the downloaded file in step 2.
5) Press the X button to start the installation, After completing the installation, the game will be displayed on your PS4 dashboard.