This is such a confusing and irritating situation we are all in. Everyone's situation is slightly different (some filed both 2018 and 2019 and still get the error). But I've also noticed something similar (I'm trying myself ) is that the people who seem to solve the problem are making the addresses and amounts EXACTLY how the IRS has it on their end. One tiny little thing that is different and it gives you the error message. I'm trying other people's suggestions like capitalizing everything in the address line or look at how the post office has it and copy that format...
