What triggers this message
As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center. – Community Bot
I've seen this several times recently. As in the case of this answer ln: failed to create symbolic link "Function not implemented -- I don't know if the answer is right or wrong, I didn't try it, but it isn't "unclear" in the slightest, and this comment is not helpful.