I had the same problem, I obtained a copy of the 2019 transcripts & the AGI matched, I double checked my self-pin, and after trying MANY times I finally decided to obtain a IP PIN. I went to "irs.gov/onlineservices" to register & request the IP PIN...it was an easy process. When I received that PIN, I went back to my return & under the "other tax situations" is a tab to update the "identity protection pin". Click edit & enter the IP Pin you received. When I went thru that process, my return was accepted. Hope this helps.
