Things got weird after the update

After deleting long-term inactive users, I'm trying to find new friends, but it says I can't add any more friends, and I can't send friend requests or accept friend requests.

There are still two spots left and I can receive friend requests but they are not accepted.

Is it just me?

I sent an inquiry, but I haven't received a reply yet and I'm so frustrated ㅠㅠ

I'm trying to attach a photo like this, but I can't even see the confirmation button.

ps) I'm sorry I haven't been able to accept the friend requests from those who have asked me to be my friend because of this situation ㅜㅜ