Reply to Jean: sorry to be unclear - the file extension is the type of file e.g. Word document or jpeg image, it appears after the file name e.g. 'myshrub.jpg'
If the file is a jpeg, and the file size only 9279 byte, then it should certainly upload, no problem. I'll ask our technical team to investigate the problem for you! I'll send you a direct message shortly, which you can access by clicking your login name, top right hand corner of the screen, and choosing 'My messages'.