Login redirects to login

I´m having this issue, login to the Admin panel redirects to the same login screen,failed logins show the error message, this happens only when the login is correct … running latest version of Grav v1.0.0-rc.4, and Admin plugin is updated, any thougths ??

Ok, the thing was that I change the name of the session cookie, and my new name includes a DOT, I change it again and everything works as normal …

So all sorted?

All sorted !! Thanks for such an amazing work !!