Model Failed to load

When I join my friend's server after I make a model then edit the model it says "java.io.FileNotFoundException: https://gist.githubusercontent.com/Dredding2000/bd496de948972b5e84b0065a5b26726e/raw". I look up the thing and nothing shows. It's like it's not updating the model site or something.

also i got to delete the model and the skins and the gist to restart it.