Error using table references in a named function

It may be syntax error, but I'm getting an error when attempting to use table references in a named function:

=xlookup(artwork_id,Artwork[Id],Artwork[Title])

The function works when I use it normally in a cell, i.e.

=xlookup(G2,Artwork[Id],Artwork[Title])

However, when I attempt to use it as a named function, I get an error.