I'm cloud gaming "Shadow PC" I can't join
it shows me this message "The VPN are not allowed on this server"
That means the server owner is running IW4MAdmin and has chosen to not allow VPN's on their server. You need to pick a server that isn't running IW4Admin. Or don't use cloud gaming. Those are the 2 choices. I guess if you find a server you really like, you could try to message the server owner and ask them to whitelist you.