Can't E-File Missouri State Taxes

When I entered both my W-2s for 2023, it said that something could not be completed by e-filing online, and it had to be done by mail. It did not say which one was incomplete, nor what needed to be completed. 

I finished filing my federal return, and now my main profile says "FEDERAL - ACCEPTED" as well as "STATE MO - READY TO MAIL" with an option to "download return."

I downloaded the return, but now I have no clue whatsoever what to do next!

Please help!!!