why does turbotax say my HSA max contribution is $0?

My daughter was a dependent student and graduated in June of 2021.   Then got a job in November and the job contributed to an HSA for the month of December.  I had her covered under my family HDHP  through April and then had her covered under my non-HDHP until November. In Dec, she was covered under her own HDHP from her new job. Entering this information into turbotax results in a maximum HSA contribution limit of $0 and a penalty of 6% for the employer contribution to her HSA in Dec.  This makes no sense.  According to the tax rules, she should be able to contribute the maximum HSA amount.  I dont even know what to change to avoid having to pay 6%!  ( She is my dependent for the 2021 tax year, but needs to file a return to get her federal tax withholding back.  Otherwise she would not because she did not make enough to require a return. If she didnt file a return, there would be no penalty! )  Thanks