A major bug fix is on the way for Bloodborne to address an issue that prevented some players from obtaining a significant item required to progress. Some very minor spoilers follow.
The item in question is the Lunarium Key, found in Byrgenwerth College. The criteria to trigger the bug involves ringing the Small Resonant Bell or the Sinister Resonant Bell in the Forbidden Woods area, items that initiate co-op and PvP play respectively.
According to a press release from Sony Computer Entertainment, this series of actions prevents the Lunarium Key from appearing, which is used to unlock a required area in the game.
The team is currently finalizing a 1.02 hofix and aims to release it next week, though an exact date has yet to be decided.
Sony advises players to not attempt co-op or PvP in the Forbidden Woods level until the hotfix goes through.
This particular hotfix won't improve Bloodborne's loading times and performance, both of which Sony addressed earlier in the week. Those are being treated as separate issues and will be refined in a future patch.