What does it mean that a player is playing on a different app version?

[Sorsha]

Why I can't revenge raid these players "Note: this player is playing on a different app version"? [MASTER]

I installed update 1.14 .1 and still I get this message: “Note this player is playing on a different app version.” Accounts with this message are often offline. [Screenshot_2018-08-16-12-44-56] How is it that they were able to raid me but I am unable to raid them? There seems to be something wrong here. If someone can explain this, I would appreciate it.

Check this out…

@Kerridoc @Coppersky @Rook @zephyr1 can you merge this with master?