If it doesn't work on binance app just shift to desktop or laptop and do it on a browser.
this could be a technical issues from the their back end. so i suggest you should try it again after some while then it will be back again. though some days ago i tried sending my USDT to P2P but also telling account Frozen and after a while i tried and it works back.
This is right and it could be needing some synching or update if it keeps on failing. @OP, inform them that there's an issue like this so that they're alerted and can give a quick solution.