Efile 2020 Amended Return

I am trying to efile 2020 Amended Return because the IRS stopped processing returns for the Unemployment Exclusion.  It keeps getting rejected: "the year of the PrimarySignatureDt in the Return Header must be equal to the processing year.  The taxpayers signature date must be in the current processing year. " I am at a loss as to how to correct.  

Should I just mail it?