Sounds like she didn’t check the box that says she is a dependent on someone else’s return. They will have to amend their return. Sorry, you now have to print and mail your return. You don't have to wait for them to amend. Even if they amend, it won't release their ssn in the IRS system.
How to Amend this year
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...
