I have, my version of GTA V has the most recent update - I installed it on the 24th at 6:38 to be specific - but I still get that message when I try to use RAGEPlugin.
I can't say for certain but I'm pretty sure I have the same issue as I came to see if anyone else was having the same issue with the RAGEPlugin included with the most recent LSPDFR update not working.