Can't login to CP after logging out

Question

Having an issue logging back into the control panel after having been logged out. When attempting to login, I am returned to the login screen with no error messages or other notices. The only way I am able to log in is using an Incognito browser window.

I am using EE v2.5.2 with MSM installed.

UPDATE: I know this typically resolves itself after some time, but is there a known workaround so clients don't have to wait hours before being able to edit their content? Is this just an EE bug?

Answer 1

Clearing cookies should get around it.

You might want to look at your cookie settings in the CP and try switching cookies/session authentication.

I was having the same problem with an MSM site. I changed my CP session type to "Sessions and Cookies" and all now seems well.

Answer 2

The reason for this login issue still isn't clear to me after so many years.

My first suggestion is to clear browser Cookies and Cache.

The second step is to add the following into your config.php file:

$config['cookie_domain'] = "";
$config['cookie_path'] = "";
$config['cookie_prefix'] = "";
$config['admin_session_type'] = "s";
$config['user_session_type'] = "c";
$config['require_ip_for_login'] = "n";
$config['require_ip_for_posting'] = "n"; 
$config['secure_forms'] = "n";  

Answer 3

I've had very good luck with setting a specific cookie prefix for every site in the MSM. This can be done via the control panel (Admin › Security and Privacy › Cookie Settings), or you can set it within the config file:

$config['cookie_prefix'] = "site_shortname_";

I'd recommend against leaving cookie_domain and cookie_prefix blank, especially if your MSM sites are subdomains on the same domain (e.g. site1.domain.com, site2.domain.com, etc.). I suspect that @MediaGirl is having luck with leaving those blank because she's forcing the admin login to use sessions only with $config['admin_session_type'] = "s";