I finish the whole game and now I realized that the pack says "installing" when I downloaded and is stuck there. Any ideas? how do I install properly the pack? I re-downloaded and that didn't work.
This can be a semi-common problem with different DLC and games for the PS4.
Sony has included an option in the PS4 OS that let's you 'restore your licenses' which basically deletes the local licenses information and downloads it from the PSN servers: