How do I fix a rejected state return from a prior year that I recently amended?

I recently amended my Wisconsin state form for 2020.  When I filed the amended state return, it was rejected.  I received an email notice of the rejection and was instructed to log into TurboTax to fix the problem.  The error message I received is:  
/ReturnState/AuthenticationHeader/TransmissionDetail/TotalPreparationSubmissionTs - Data in the Wisconsin Amended return is missing or invalid.

I do not see a "Fix my return" button or any other indication on the main screen instructing me how to fix the issue.  It also appears I am no longer able to access my state 2020 form online.  It says I have to use the Desktop version now.