It appears that RustEdit does not serve proper 404 error codes, which results in html data being fed into the ImageLibrary plugin.

This causes errors in plugins which use ImageLibrary when a new item comes out (this week its all the new modular vehicle items) 
(NullReferenceException: Object reference not set to an instance of an object)

Please use a service which serves proper 404 error messages, or filter out non image data from RustEdit.