Upgrade Prestashop 1.6.1.x to 1.6.1.15 - Unable to login

[Machiavelis]

Good evening, 

 

Earlier today, I use the "1-click upgrader" to do the recommanded update from my prestashop 1.6.1.X (don't remember which one) to 1.6.1.15 (stable) 

 

Everything look normal, still it was the first time i ever run an upgrade so I might have done something wrong, after the upgrade, I try to login into the Admin panel, I got a nice new admin login panel 

 

 

 

If I put down a "Bad login" I have an error message (which is good! ) 

If I ask for a new password it work also (Which is amasing) 

When I try to login (add username and password) then it just reload itself:

 

The Url is  : http://lessigils.com/Store/admin-1494460685/index.php?controller=AdminLogin&token=82f33404992bb81476bae698f82152c7

 

I Must admin that I have no clue why this issue is happening, and so far I wasn't able to find a solution that work. 

 

I try on 4 different browser on 2 different Machine, one at home, the other at work... 

I try to clear the cookies

I try to add the www. or to remove the www. 

 

If somebody could help, it would be very appreciate.