Solved

facebook login

Cosa hai provato a fare?
login on the desktop app with Facebook account

Cosa è successo invece?
the game created a new account associated to my already facebook account used

Il problema si è verificato durante l'utilizzo di dati Wi-Fi, mobili o entrambi?
Both

Il problema si è verificato nell'App, sul PC o in entrambi?
PC

Quale sistema operativo ha il tuo PC?
windows 10

In quale browser hai riscontrato il problema?
desktop app

Può essere riprodotto il bug?
I believe so if you have a Facebook account with already an account on the browser

Commenti addizionali:

Hi Sameer,

I have solved your problem. The excess account has been deleted, you should have no more problems.
Please let us know if everything is correct now.

now I don't know why but if I click on the Facebook button the game doesn't load anything and I already installed it all from zero and the only this that appears is a circle but than nothing 

Read here : https://igpmanager.com/forum-thread/43269
You may need to update the web app.