This happens for me on 20.04 LTS when the file being copied has a colon (:) in its name. The error doesn't pop up until the very end of the file copy process, and in the end, the file is not copied to the destination.
This happens for me on 20.04 LTS when the file being copied has a colon (:) in its name. The error doesn't pop up until the very end of the file copy process, and in the end, the file is not copied to the destination.