Your PS4 must be on a exploitable system firmware version (historically versions like 5.05, 6.72, 9.00, or certain newer vulnerability windows).
If you have a standard PS4, purchase the game digitally or buy a used disc. It is frequently on sale for under $20, includes all updates automatically, and grants you access to the full multiplayer servers. The "PKG link" route is best reserved for archival purposes or offline enthusiasts only. call of duty black ops 3 ps4 pkg link
: Modified consoles use "fake packages" (fPKGs) to run backup copies of games. Requirements for Installing Black Ops 3 PKG Your PS4 must be on a exploitable system