Recently, I had the problem that a Robocopy script created folder with a space character at the end on the Windows NTFS file system. So for example
In File Explorer, I could not delete the folder, the error message said "Object does not exist". Also renaming the folder was not possible.
The onyl solution was to go to a CMD box and issue the command
rd /s "\\?\D:\bad\folder\path "
Just answer "y* when you are asked if you really want to delete the folder.