I am using Minecraft for PC, and whenever I log in to a Minecraft sever, which would be Hypixel, Uberminecraft, or just survival, it shows me as a Steve instead of my downloaded skin.

If I log into a server when I upload a skin, myself and other players are shown as Steves or Alexes, and yes, I did try uploading it again.
Here are the skins I tried downloading below in the attachment.