when I tried to login into Magento admin it's show me error Invalid Form Key. Please refresh the page. and I know I am entering correct username and password. when I tried second time to login with same user name and password it's allow me to login successfully.
after 2 try finally I login to my Magento admin panel but after that when I click on logout it's refresh page and redirect me to dashboard.it's not logout from Magento admin panel.
now if I try to login in admin it's doesn't show any error it just refresh and url is changed.
for ex : my admin url is : example.com/admin username : admin password : admin@123
now if I try to login using this details page is refresh and my url is change from example.com/admin to example.com/admin/index/index/key/95fdcbe3f6af413384d42ea557a7b4e7/