@Just-Lisa-Now-  "The error that it cant be Efiled?"

No, the error that a rumor travels halfway around the world before IRS puts on its shoes.

IRS sees its mission as EIC fraud prevention.  To do that, it requires proof of earned income other than just the taxpayer's word for it -- at least to accept an e-filed return.  It will get around to recognizing the problem it has with this, since the 2019 lookback rule was enacted on December 27. But those who refuse to read the law will continue to express confusion.