Hey stevez_pun, if you are having trouble contacting another player via their profile page on the forum, you can always try adding that player to your Ubisoft Connect friends, and starting a chat with them from the Ubisoft Connect launcher if you play on PC. You can also chat whilst in-game using the Connect overlay too.
At the moment, we are aware there is an issue with the 'Send Message' tool on this forum and we are hoping to resolve it soon.