So here I sit in January 2023, trying to do some 2021 returns as a CVITP volunteer. I have done several hundred returns successfully this past year, but now I am seeing the Err.051 - you are not authorized to request information for the SIN xxxxxxxxx. I have a valid RepID, and all of this has worked very well for months and months, but suddenly the autofill does not work after successfully (apparently) submitting the federal authorization from Ufile 2021. Also,when I sign in to my RepID, the system will not grant me access to a SIN for which I have just finished obtaining access through Ufile. I verified with the tax line that I had successfully gained authority to view these SINs, but still the system will not let me do it. I've seen this problem before and I know it went away again, but is anyone working on it, or does anyone have any ideas what I could try?