In vBulletin, VaultWiki installed the FILE BB-Code with the wrong image path. The correct path, shown above, is bb_image.gif
You can correct these manually or wait until the next release, where we have added a duplicate image so the installed image path actually points to something.
I see you are missing a number of editor icons. To make sure the image paths are applied for buttons in the wiki resources directory, make sure that Wiki Group is turned on in the Syntax Manager for the required tags.
Marking as Fixed since the missing image now exists.