Help with trading needed

So I’ve been slowly making my way through this game, and wanted to see what I could trade using wonder trade and stuff, but I’ve absolutely no idea how to start trading, theres the right-most button in the dexnav menu, but whenever I click it a message pops up that the “server is offline or I have a poor internet connection” (and I’ve never had an issue using online trading with games such as uranium). Am I being phenomenally stupid here?

Check if you’re on the latest version (1.2.7). If you are, it’s likely something on your network blocking traffic.

ah thanks

If it wasn’t already painfully obvious, I am a huge newbie for this game… how do I check the version? I can’t find anything that’d indicate what I was on