Keep getting an error message that "a non-taxing school district has been entered generating an SD-100"

I didn't enter anything in the software. The hyperlink takes me to screen 54.121 and the School District box, but it's empty. I can't find my client's school district in the drop down menu. I saw an earlier discussion where they said to just suppress the form, but I don't see that option anywhere.

We didn't have this issue in previous years and the client didn't move.

Is anyone else having this problem?

Thanks.