I'm not sure why the reject message is for the spouse. But they never send two reject messages, so it's possible that the primary AGI also didn't match, but for whatever reason the message about the spouse is the one that got sent.
Try using zero as last year's AGI for both taxpayer and spouse. Since the 2021 return was filed on extension, it probably was not processed in time for the AGI to get into the e-file database for 2022. Obviously it was eventually processed, and the transcript is on the web site now, but that doesn't mean that it was processed in time to get into the e-file database. Apparently they only create the database once, and never update it later, so anything that wasn't available on the cutoff date never gets picked up. Try using zero.
