I realized that in the Step-By-Step steps for Federal Taxes, in the Distributions tab I had selected "No, I don't need to have a Schedule K-1 created." I did this because there were no distributions for the year. When I changed the choice to "Yes, I still want a Schedule K-1 created even if blank.", then I was able to click the Save as PDF in "Distribute K-1s". The original error message was wrong because the reason it wouldn't save had nothing to do with needing to add partner/shareholder information. Anyway, perhaps this was the issue with others who experience this issue.
