USSEP 4.2.5b alters some Survival mode records. Install the CC Survival Mode Patch For USSEP 4.2.5b from Nexus to restore full functionality.

For those navigating the modding scene for Skyrim Special Edition version 1.5.97

The patch will likely come in a .zip or .7z file. Extract it to your Skyrim SE mods folder. If you're using a mod manager like Vortex or MO2, you can simply install it through the manager.

Check your game version by right-clicking SkyrimSE.exe > Properties > Details. If it says 1.5.97, verify you installed USSEP 4.2.5b, not the latest version. USSEP is looking for Creation Club files you don't have.

If you use the to keep your Skyrim game executable at version 1.5.97, the newest version of USSEP will not work. It will cause your game to crash at startup because it looks for data files only present in version 1.6+. How to Download USSEP for 1.5.97

Alternatively, you can utilize the Unofficial Skyrim Special Edition Downgrade Patcher .

: Some players update to the latest version via Steam to get the newest assets, then use the Best of Both Worlds Patcher to downgrade the executable back to 1.5.97. This allows you to use the latest USSEP version with the older 1.5.97 binary. Compatibility & Requirements

typically only host the latest version, which requires game version 1.6+. How to Download USSEP 4.2.5b for 1.5.97

Here is everything you need to know about finding the correct, safe version of USSEP for that specific game build.