Whenever I try to upload my billboard it always comes up with this. We only accept jpg, png or gif image types

My billboard is clearly a png :/

I've tried doing it with a jpeg and gif as well but it doesn't work.

Could someone help? c:

The file type needs to be lowercase; .png instead of .PNG

Try opening the open, deleting the source file, and then re-saving it as "title.png".

Thanks! I'll try that.