I was about to open a thread to ask the same, as I haven't find the answer after many and many searches.
I basically can't make the actions to work at all, even if I set
Start of layout -> NWjs -> set clipboard text to "test"
Nothing happens, the clipboard still have whatever it had at than moment.
My goal is, as mindfaQ 's, to be able to write an external file. I also think a working file would be enough for me (I hope).