TT RETURN ACCEPTED LAST MONTH BUT WHERE'S MY REFUND NO LONGER SHOWS IT

TT electronically filed my Return on February 20.

 

TT responded the next day that my FED and State returns had been accepted.

 

A few weeks later WHERE'S MY REFUND showed IN PROGRESS.

 

Now (another week later) however,  it shows REFUND STATUS ERROR (I’m sure my info is correct).

 

Why might this be?

 

Thanks, 

Alan