Sos 1.6.640

: If you already have XP32 Maximum Skeleton Special Extended (XPMSSE) installed, do not check the option to install skeletons when running the SoS installer. Overwriting your existing skeleton is a common cause for the mod not appearing or "broken" character models.

" (SoS) mod often results in compatibility issues because the original mod's DLL files were never officially updated for that specific game runtime Compatibility & Fixes for 1.6.640 The DLL Issue sos 1.6.640