This was still an issue for me filing my 2023 Utah return after importing a PDF of my W2 from Utah. Changing the WTH -> wth (to lower case) in box 15 employers state ID number did the trick wonderfully! I never would have guessed this was the problem.
To be clear it's best to change it in the original W2 data under federal income rather than trying to edit the form on the state tax checking page.
