Minecraft Windows 10 Edition

Solution
Minecraft Windows 10 Edition is the mobile version ported to Windows. You can not play cross platform on any version of the game.
Note, this is not the same version as PC or Console. It is the mobile version.
Minecraft
Mojang has announced a new version of its block-building mega-game catchily entitled Minecraft: Windows 10 Edition Beta. It’ll be free to current owners of the PC version of the game and $10 to everyone else. The fresh iteration allows eight-player co-op building over Xbox Live, and will let you build alongside Pocket Edition players via a later update. It’s a smart move from Microsoft, which bought Minecraft developer Mojang for $2.5bn in 2014: if you want people to download a new version of your OS, release it with a new version of a game that has over 100m registered users.