E-filed Form 4868 back in April.  Just finished preparing the Federal 1040 and I can't e-file it because the taxpayers have an EIC and only SE income.  When I try to efile the Missouri and Iowa returns, they won't let me because they are giving me an error message

"Processing Federal Form 4868.  The Federal return is in the process of electronically filing Form 4868.  Therefore the error checks needed to electronically file federal tax return may not have been cleared.  The state return can not be filed until the electronic filing of Federal Form 4868 is complete".

There are no error messages on the Federal return and the Form 4868 has been accepted by the IRS and updating the Form 4868 acknowledgment doesn't work. (It used to in prior years).

Any suggestions?