when you say graphic what sort is it? Is it correctly named - ie yourgraphic.gif? Have you tried deleting it and then uploading it again? (not as daft as it might seem because it sometimes happens to me) Or even renaming it and uploading it again.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.