An Image file has turned white?

Hi,

I've been working on an After Effects Project and for some reason one of the images used in the project has turned white. I have no technical explanation for this. All the other images in the folder are still there and displaying as normal. Just this one image has turned white. Both the thumbnail, and the actual image when I click on it. Even inside the project files of after effects.

I had the project open yesterday morning before going to the shop and it was completely fine. I have heaps of backups but I'm just wondering what could have caused it.