how do i fix this????

https://preview.redd.it/lk7qmbfpx1fh1.png?width=412&format=png&auto=webp&s=61e768ba490942f9605b2475f904ed69592641eb

whenever i try to send my friend a message, it just says this. it only does this for this one person literally what. how do i fix this ?????