"only support one devices"

I am also having this same issue with 3.1.2 . I can force stop the app, then clear the data to play without getting the "only support one devices" error on a new game. After changing my name, the error comes up again. After force stopping and clearing the data, if i log in, i get the error immediately.

Every time, I have to force stop HK, and clear the data in order to play a new game without the error, but if I log in, it immediately gives me the error.

I'm also having this same issue. Is there a fix to it? What is causing it to be like this? I finally find a fun intriguing game and it screws up like this?? Please help!!

Same issue...using 3.1 on Acer A500 tablet. Has a solution been found?

[support9]

first of all, please make sure that you haven't logged in the account on any other devices, then please clear your phone cache and exit the app completely even from background running list(multi-tasking function) then relog in the game with the account from "MY ACCOUNT" on start page.
Any other problem please let us know.

first of all, please make sure that you haven't logged in the account on any other devices, then please clear your phone cache and exit the app completely even from background running list(multi-tasking function) then relog in the game with the account from "MY ACCOUNT" on start page.
Any other problem please let us know.

Have tried all of these multiple times. Same result. If I try to log in an existing account, I get the message before main city loads. If I clear everything and start a new account, it will work till it re-loads the main city (by building something, upgrading something, etc...)

change your emails and passwords just to make sure no one else has hacked/been given access to your account.

Im on 2 servers 1st server is on s79 and 2nd is s87. S87 is working fine now s79 isnt. I have been trying 2 log in there but its saying it can only support 1 device. That was yesterday! Now 2day its saying invalid password! So haypi what are you going 2 do about this problem

So is there a fix for this issue? It seems like an account problem considering I can clear the cache and start a new game without problem, but when I log back into my original account it goes back to the error.

Still waiting for a solution to this...support, any chance of a fix anytime soon?

My friend is having this problem now. Have there been a fix? I would like to know. He create a name and then this happens