If you hit decryption roadblocks, your best bet is to explore PS4 homebrew communities like PSX-Place or GBAtemp. They can guide you on extracting your own console’s keys (a non-trivial process requiring a jailbroken PS4).
Disclaimer: This blog post is for informational purposes. The author does not condone piracy or illegal modification of copyrighted software. ps4 pkg extractor download
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