Use the IDE mode to make the game patch update over 5.05 : r/ps4homebrew
PS4 7.55 jailbreak ENABLE IDU MODE+OMSK - YouTube
PS4 Stuck in IDU | GBAtemp.net - The Independent Video Game Community
Files from PS4 kiosk to build game manager : r/ps4homebrew
GitHub - BetterWayElectronics/ps4-nor-validator: BwE PS4 NOR Validator. Designed to validate the entire raw and semi-encrypted firmware of a PlayStation 4. Created using Perl.