Customer unable to accept and rate

I sold some rocket league keys to customer today, and he is unable to accept the transaction and rate me. He said it just doesn’t give him the option within the app/website. We tried waiting a couple hours hoping it was just a glitch that would resolve itself, but we didn’t have any luck. I’ve already delivered the keys and marked them as delivered. I’ve had sales go through before and after that sale with no issue. Any help would be appreciated. Thank you

Can you please send me the invite code so we can check it for you?