I got the same error. Apparently, my marital status did not fill out in the form even though I filled it in on the federal return portion. I had to do the following:
1. Go to "View" in the toolbar
2. Select "Forms"
3. Select "Info Worksheet" under the Utah Individual section on the left side and then manually select my marital status under Part III - Filing Status.
Hope this helps someone else as well.
