I have done every single step listed, completely uninstalled and reinstalled everything, have the dlc downloaded, selected the correct filepath (D:\Steam\steamapps\common\Divinity Original Sin 2\Data), and still crash with
PackedFile: Trying to get filedata 'D:/Steam/steamapps/common/Divinity Original Sin 2/Public/Game/Assets/Materials/UI/Base.lsb' from solid archive 'D:/Steam/steamapps/common/Divinity Original Sin 2/Data/Materials.pak', this should be done via the filecache!
Trying to open file for read (the lsb file above) while it doesn't exist!
failed to open
loading of lsb file failed
Material file with id [9169b076-6e8d-44a4-95eedf9eab63] and source (the lsb file) failed to load!
Failed to load MaterialResource! UIBase
A Material with id [listed above] is not loaded!