Why isn’t my pfp updating? [closed]

I’m new here btw, so I’m trying to upload a pic to be my pfp. But for some reason the pfp stays the default gray icon? Is there a reason for this? Am i using the wrong photo link?

Sorry if this is a dumb question, I’ve never used these kinda sites before lol. Not even old myspace! So all this fun stuff is new to me. It seems great tho!