How to Fix Unknown ErrorFFFFFFF
- Go to Steam and open Settings.
- Go to the Shader Pre-Caching tab.
- Check the box labeled Allow background processing of Vulkan shaders.
- Disable any overlays you have.
Open Rockstar launcher, click “settings”, then (on the left side when you see your games) click “Red dead etc.” Choose “verify game file integrity”.
Find Red Dead Online or Red Dead Redemption 2 in your Steam library. Right-click on it, and select Properties. Open the LOCAL FILES tab. Click on verify integrity of local files.
If you’re using any mods, uninstall them and reboot your machine, then install them one at a time, launching and playing the game for the same amount of time it takes to crash with each.
If that doesn’t work, move your savegame folder out of its default location, change the folder’s name to something like RDR2 SAVETHIS, uninstall the game, reboot, reinstall the game, then reboot your machine again, try playing for however long it takes to crash, if it doesn’t, copy savegames files into savegame folder, and launch.
“Unknown Error” typically means the program is looking for something that should be there and isn’t, or returns back data that is incorrect. Bad updates and/or mods are usually the culprits, but AV programs will sometimes block access to files the program deems harmful to your computer, so make sure you add the game to your AV’s “exceptions” list as well.