If you experience this problem, chances are that the image you are trying to upload is too big in size, or is the wrong type. Please check that your image is in a compatible format (i.e. jpeg, bmp, png).

Solution: Resize it using an image editor such as Paint for Windows or Gimp for Mac. If this does not work and your PC is a Windows based machine, please go to www.java.com and download and install Java for Windows.

Another problem may be that your browser needs updating (especially with Chrome) or Java is not enabled in your browser.