I am new to magento. I have recently setup my site on magento. Today I was trying to increase the logout time frame for admin session as it used to logout in few seconds. As I tried to save the time to 600 seconds. I received an error on the page. and since then I am not able to log into my magento admin login though the site is working fine.
when ever I try to login into my admin. I receive an error stating
"Invalid form Key. Please refresh the page."
I have tried finding the solution and tried a solution form a below page to add "return true" in "Session.php" page.
Though, not of much use as after using this solution only the error message got disappeared but I am still not able to login.
We are using Magento 1.9.2 version