STATUS

Where are you trying to upload them to? Your RMN locker? If so, there is no progress bar. You just have to wait until it says that your file was successfully uploaded.

Out of sheer curiosity, exactly how big is this file, anyway?

Not one character, as in something like $Oharu.png, but the default VX Ace sprite output sheet? You should still be able to upload that into your locker. Unless I'm missing something insanely huge with this situation (I probably am).

If it's for your game made in VX Ace, and it's the same size as "$Oharu.png", maybe it's how you named it that it's not loading properly? Single characters are supposed to have a "$" at the beginning of the file name.

It would probably help if the file was in the "Graphics\Characters" folder of your project directory too. VX Ace automatically sends character sprite outputs to that directory, but if you moved it as part of the process to cut it down to size...

*assuming waaaaay to much with this post*

author=PixelGem
file:///C:/Users/julia_000/Pictures/Rpg%20maker%20game/$Leia.png
thats one of mine i probably did something wrong in here or something

Okay, this kind of notation explicitly refers to a file on your local hard drive. That's probably why you were getting the "unsupported png" message. To put it into your locker, go to your locker. There should be an "upload" button. Click on that, find the file (thankfully, we know the location), and click the "Upload" button when you're done. It should upload at that point.

To set it up as your avatar... no. I'm assuming too much.