This is star wars

So i'm trying to make my game, and i'm having difficulty with adding pictures. Whenever I attempt to upload them to "My stuff" it just tells me that "sorry that can't be uploaded" or that there was an issue or something along those lines. Is this a problem with the site right now?

Also when I try to do this through the "source" option and manually put the picure on my page via IMG coding, it works. But when I go back to edit that page after the "source" coding dissapears. Am I doing something wrong?