Quick answer
First reload the latest checkpoint, fully restart the game, and verify the expected objective and inventory. Back up saves before any file-level troubleshooting.
Safe recovery order
- Record the room, current objective, platform, and last action.
- Reload the most recent checkpoint once.
- Exit to the title screen and reload the save.
- Fully close and restart the game or console.
- On PC, verify installed files through the storefront.
Do not delete save files or download a stranger's save as a first response. If the problem repeats, compare the current objective with the matching walkthrough chapter and report the exact room, platform, version, and last action to the developer.