US Immigration from Canada

We submitted my wife's AOS package a few weeks ago and just got it back today. It was stated on the rejection letter that the i-864 and i-944 were required, which we included in full including all required evidence. None of the forms are outdated, they match what's currently on the USCIS website.

I'm at a loss for what to do here. My wife and I, as well as my parents all looked over it and none of us could find anything obviously wrong with it. Looking for any pointers as to what I may have screwed up on, especially if anyone's had any similar experiences. It is incredibly annoying how you only get vague indications of what's wrong when they send these rejection letters.

Thanks in advance.

Edit: the only thing I can vaguely think to do is to go through and write and/a on every single blank section and hope that fixes the problem. But I can't be sure that is the problem.

This is the continuance thread from:

Hello, my husband has a 2 year green card. We have to renew it soon to a 10 year green card. Does that mean we are removing conditions ? Can someone help guide me to what section/ papers I need! TIA!!

I'm looking for a new job, and I'm realizing that I really should have removed the "valid with DHS authorization only" line from my SSN card. I called the local SSA office, and they said that they will not send me a clean card with an extension letter, so I have to wait.

I have an expired green card, the extension letter, and the cursed SSN card. I know I'm legally able to proceed, but am I going to have any trouble with new employers? I'm sure it's case by case, but has anyone had good or bad stories you can share?

So, we had an approved K1 application last year. I came to visit my fianc , and due to restrictions etc, we decided to get married and file AOS. We filed Sept 2020, and sent an email to the NVC to withdraw our K1.
The NVC replied to my husband (petitioner), saying to send in a signed letter and marriage certificate, so we did so. They did not respond.
My Canadian address received the letter from the NVC saying my case was forwarded to the Montreal embassy last week. We emailed both the NVC and the Embassy. The NVC said contact the embassy. I forwarded my husbands email he sent to the NVC to the Montreal embassy and explained the situation. I did this last week and have not heard back. Should we be concerned? Or just retain an email trail for my interview? I ve already done biometrics for my AOS....and received the RFE for the I944.

thanks