Which version of BWS are you using?The current version on https://github.com/B...p/BigWorldSetup
I don't think that version of BWS was updated to reflect the new component in Jatsey's version (the V2.3 created a new component for some encounters). The Sandrah mod requires this so you'll have to use Jatsey's version. As Jatsey mentioned, you can pause and manually install her version or switch to the EE Only BWS here (https://github.com/EE-Mod-Setup). I just did an install a couple of weeks ago, the new components are reflected on that version.