E-filed an extension (7004) for Form 1120-S.  IRS reject message says "IRS believes that the entity type of the client does not match the entity type in the electronically filed extension".  Refers to 7004 Line 1 as the error.  ProSeries automatically entered "25" which is the correct code for 1120-S returns.  Also filed this client in 2019 as a 1120-S entity, no problem then.

Any ideas?