I\'m having troubles logging into Magento\'s admin panel on one of our staging sites (it works 100% on our webdev servers and was working just fine not too long ago on the s
Hi I had the same problem and I solved it by deleting all files in /var/session . I think it's because too many session in Magento!
and for security, I changed 'Use HTTP only' to 'No' in 'Session Cookies Management' of the 'Web' settings after I can loggin again..
I found this solution on the internet:https://magento.stackexchange.com/questions/26071/magento-1-9-can-t-login-to-admin-panel