I can't choose my own profile picture

Every time I want to upload my own pic the site rejects it! The pics are small enough but they still cant be uploaded. However they are on my desktop, is that a problem?

What are the exact properties (dimensions, file size, format) of the file you are trying to upload? The first thing I would check is if it is a JPG, PNG, or GIF. Some other formats may be supported, but I wouldn’t count on it.