I moved some files between folders, and this happened. It happens a lot with iCloud.
The problem, I’ve read, is that macOS is trying to download the file from iCloud, and then move it, and it gets a teeny bit confused.
It’s been going on a while.
I can’t believe Apple broke moving a file.
Update
Two restarts and two hours later and it’s still not moving.
I could move them via terminal, but I refuse. On principle. I should be able to drag and drop a file.
I’m currently debugging moving a file.