Skins dont show up

in minecraft launcher it will show that im using a skin but in single player and in servers everyone including myself appear as Steve, but this is only on my screen, because i was told by other people that they could  see my skin , and told me theyre not the Steve skin. It only happens on this computer though, because i logged on my other computer and was able to see everyone skin as its suppose to be (including mine) Can you please help fix this? i dont think the version im on matters but im on version 1.15.2 Minecraft Java Edition i added 2 pictures on a server and in single player to show its not a problem with the server, there was also a picture to show that no ones skin shows up