I have a Magento 1.9 site and the customer login form does not work. when I try to login it just redirects back to the login page. when a user creates an account that works and they are automatically logged in. Also I am able to login to the admin panel. just not able to login as a customer.
I confirmed I am using the correct user/password and also confirmed that the form_key input is there.The customer login worked fine. However I recently moved the website from a VPS to an Amazon AWS cloud and that has been the only thing that has changed with this website. I confirmed I have php_mbstring installed and enabled.
Looking in the system.log I only see the below DEBUG (7): XML_ERROR: DEBUG (7): XML_ERROR: