The error says: "The page isn't redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept cookies."
Another thing, in order to create pt.comunidadcrm.com being Multisite, I modified the wp-config.php inside the subdomain folder (/Portuguese).
BUT i had to modify the ".htaccess" wich i did not do because in the network set up said that i had to edit the .htacces in the main domain folder, if i change that file the main domain wont work.