The cortical parcellations are either volume atlases, or surface textures that are valid for one and only one surface tesselation. If you want to use a parcellation you download from somehwere else than Brainstorm, you need to import the surface that goes with it.
For the Yeo atlas, refer directly to Jeff Eriksen’s posts, and contact him directly if you have questions:
How to import other brain atlases to use as scouts
Not allowed to rename atlases