You can contact your county election office. Since ballots aren't opened until Election Day, they'd have it marked as received or not, but not much else. It's legal and standard for the election office to tell voters if their ballot was received or not, and she can ask if the printing error disqualifies her ballot.

Her vote definitely isn't lost, you might have to do a few phone calls to confirm and fix but it's not all that difficult.

Good luck.