The same thing just happened to me, but in 2023.

I, too, am able to submit other files.

There are no pdfs attached to this tax return, so this "solution" is not a solution.

I am very upset with Intuit right now. I have to sit in a closet to do taxes, because the server is the only computer that runs the ProSeries software. We've called them multiple times, and they claim it's a network problem, and we need to get our IT person in here. Our IT person has come in twice, and the network runs everything else fine. Theirs is the only software that is not working. But they refuse to support their software. In the mean time, I have 250+ returns here that need to get filed between now and October. 

And now this.

I'm ready to switch to Drake.