Authentication error

I use a Galaxy note 3 with 4G LTE. T mobile is my provider.. I try and log in but am unable.... I am left stuck on the. This is a android device... How do I fix this log in issue
Comments
Hizeki,

have you tried reinstalling the app on your device?
I have already reinstalled the game on my Galaxy note 3=(.this is a very annoying problem
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