Galleries Not Displaying

Hi. I’m using Virtue ‘free’ version 2.9.0. I have used Virtue for some time and it is a wonderful theme with great flexibility and reliability. Thank you for a superb platform on which to work. Love it. I don’t know what’s happened to picture galleries very recently (last 24-48 hours). I first noticed it on my iPad and then my iPhone and thought it was related to responsive features on mobile devices but it is also the same on my PC running normally. The galleries now don’t display thumbnail pictures just boxes (on mobile) or boxes with caption (on PC). Clicking on any of the boxes brings up a grey backdrop with ‘The image could not be loaded’. I’ve checked and this applies to ALL galleries on my site! An example is: http://www.craveguitars.co.uk/home/gallery/fender/. I’ve asked someone else to look as an ordinary user and they get the same thing. Other images are fine and it only seems to affect galleries. I’ve also tried updating both galleries and pages and it doesn’t make any difference. Is there anything that I need to do? Please help.

Thanks and best wishes
Tony (CRAVE Guitars)