WordPress Multisite redirection

Hi,
I am working on Worpress multisite without sub domain.
Today, I decided to update my wordpress installation from 3.9.2 to 4.0.
All working well, then after the update, I have a message on top of the browser in backend and tell me to upgrade my network.
So, I try to did it but I have an error message : “too many redirections”

I check my back end the message to upgrade my network disapear and my multisite wordpress seems to working well.

This error is important ? How can i correct that ?

Here is a part of my wp-config :

define(‘WP_ALLOW_MULTISITE’,true);
define(‘MULTISITE’, true);
define(‘SUBDOMAIN_INSTALL’, false);
define(‘DOMAIN_CURRENT_SITE’, ‘www.site.com’);
define(‘PATH_CURRENT_SITE’, ‘/’);
define(‘SITE_ID_CURRENT_SITE’, 1);
define(‘BLOG_ID_CURRENT_SITE’, 1);

example of url of my multisite :
https://www.site.com
https://www.site.com/fr
https://www.site.com/uk