Trade In issue

So I’m trying to trade in my rares to get an import, but whenever I do, I keep getting this “An Unknown Error while communicating with Rocket League servers please try again later”. I have restarted the game, checked connection ( i could play with others fine) and funny thing is I also could trade in my other trades. Like I traded in my import blueprints for an exotic one, and everything was fine. So what is going in and how can I fix this issue? I can trade in everything except this one trade.