so my dressing room doesn't work, it didn't do anything when I interacted with it

when I updated my game to 1.21.80 yesterday, I opened it, and it auto logs in as usual, but as soon as it logged in, I realized something strange, that is, my skin didn't change, and I tried to change it myself, but as soon as I entered the dressing room, I saw that all the characters are disappeared, I tried to create one then use classic skin to get my skin back, I created it successfully, but when I clicked on the “classic skins“ button, it didn't work. And that's why I'm here to looking for help. Thank you for reading this patiently.