Random UV Map Texture missing error

Starting yesterday and spreading today at our office, we are having the issue of a “missing file”. The exact dialog in the rhino command line is as follows:
File does not exist, could not download http://files.mcneel.com/rhino/6.0/textures/Untitled.jpg
This prompt happens once upon opening a file and 6 time when using the copy–paste commands.

I eventually tracked the issue down to a texture called “untitled”. Once i delteaed the texture, the problem goes away. However, every file we open has this issue, whether the file was generate today, or yesterday, or 3 months ago, or even is a brand new file. It seems like Rhino is automatically generating this mad texture upon opening. Any advise on how to stop this?