I was trying to duplicate a folder in the folder where it already is via Copy & Paste. In most systems you get a "file (copy)" duplicate and that's the case with files in Open Box, but not with folders where you get an error. So I tried to rename it first using the F2 short cut. After some attempts I got the fascinating Error - Success error.
BTW, I'm assuming it's Open Box's fault, but I might be wrong, sorry in advanced if that's the case!