The patch addressed a regional error where players would receive "Network Error/Invalid Login" messages. DLC Access:
Adjusted sight behavior to prevent "teleporting" bugs. dark deception 196 patched
suggest that version 1.9.6 is the most stable "Chapter 4" build. If you are experiencing crashes in earlier versions (like 1.8.x), updating to 1.9.6 is the recommended fix. For those still facing issues: Graphics Settings The patch addressed a regional error where players