Slitherine

It looks like the Microsoft Store version of the game that I get through game pass is at 1.2.6 for me but I saw someone reference a 1.3.3. Is there a more updated version of the game than 1.2.6 and should I currently be able to get it on game pass?

I've loved the single player on the game and want to try multiplayer but I'm prompted with a message that my version is too old when attempting online multiplayer. Thanks for the help!

Here is a picture of what happens when I select PBEM++/Online

I have uninstalled and reinstalled Panzer Corps 2 twice but keep getting the same error