I don't have a solution or even an answer, exactly, but I have a work-around. I'm getting this same problem, and additionally, when I try to copy or move a directory, I get a message that the Finder can't complete the operation because some data in "" can't be read or written (Error code -36). Again, just a problem with directories/folders, but single files are fine.
The issue seems to be with the fact that I'm in my iCloud Documents folder. If I create another directory in my home directory, and copy the files in there, I can compress it with no problem. So, a work-around, and the bits of a root cause, but not exactly a fix.