Why was my amended 1040X rejected?

IRS rejected e-file of Amended 2023 return.

 

Filed Amend return 1040x to reflect 403(b) excess deferral.  Followed the instructions https://ttlc.intuit.com/community/retirement/discussion/re-i-have-made-excess-401k-deferral-in-2023-...

 

No errors from TurboTax, submitted e-file and  got a  "rejected by IRS", but no error codes nor errors upon further turbotax review.  Any suggestions? (besides mailing the 1040X to the IRS) 🙂

 

Screenshot 2024-04-08 at 12.19.08 AM.png