When I try to upload skin, it says unable to upload skin in 1.19

Whenever I try to wear a skin that I saved, it says unable to activate skin. For some skins it works and for most of mine it doesn't work. I can only use like 2 skins out of the 20 I uploaded and saved. I have seen others post the same problem, but they that this issue was fixed for them. I tried searching it up online for any help guides with this and I found none that works for me. It still isn't working for me.