@Nancy2235  It may have to do with the QB Desktop year you're working with; past a certain point, they don't deal with prior year versions.

That being said, I suppose they weren't really supporting it in the first place; I've never done it myself, but this community is rife with stories about losing several aspects of their data during the migration.

There is a group on the community who'll probably reach out to you sometime today with alternative routes to move your data.