Why can't I set animated backgrounds on my Apple Watch SE?

Good day. I'm trying to set an animated background on the clock, as I did before. But it only installs as a photo. Live photos also don't install as an animated picture. Live photos also do not install as an animated picture. What could be the problem? It is possible to add only as a photo. Why?. What could be the problem?

[Re-Titled by Moderator]