Post not found error in Auto Comment Reply (Facebook)

Hey guys. I've been trying to set up the auto-comment reply for my running Facebook ads. It keeps giving me the "”Post not found" message. I tried entering Post ID and URL, still not found. I tried it couple of times on separate occasions. I'm running 5 Facebook ads and I get the same message for all. :(

I did refresh permission also. I also cannot find the dark post under the promotable post tab. It's not my first time to set this up, and it worked fine, but it was for a different Facebook page. I really need to set this up since I'm getting a lot of inquiries per day and I need to redirect the comments to the chatbot flow. What else can I do? Thank you in advance for your help.