Problem Diablo 3 Launcher

So, Yesterday I bought Diablo 3, thats the first time i buy any content on the Blizzard store. I downloaded the launcher called ‘diablo-III-setup’ . But when I click on it I got the error message associated to the key ‘BLZBNTBTS00000029’.

I already tried the classic advices Blizzard provides but nothing seems to work : I already tried to ’ update my drivers’ and ‘closing my background applications’ . But its not working
And when I try using “Battle.net® Desktop App” to go through the installation , I got the exact same issue : I download the launcher of the Battle.net but when i click on it I face the BLZBNTBTS00000029 error.

I was wondering if someone had the same problem. And if its the case how did you managed to solve it .

Thanks for your answers.