Problem Solved.  After a good part of yesterday working with ProSeries to rebuild and error check all my updates and then this morning with the IRS E-File HelpLine , they were able to hint me toward one of the four kids as best as they could considering what they could share.  I send the mom a note to triple check the spelling and SSN on that kid or to then call SSA to verify since I know they won't talk to me.  She calls back an hour later and says OOPS - the last digit was wrong on the number. Says Oh yeah, now I remember something like this happened a couple years ago but I thought the guy fixed it. Why it took two days of my time for recall to kick in, I don't know, but I also don't have four screaming toddlers hanging on me. Strange thing is I'm looking at the copy of 2020 returns filed by someone else and it all went through OK then.  

So anyway, the Reject was Correct, ProSeries was fine (and very helpful), and the cards were just stacked against me.  Thank you all for your help