If you leave the Link2Feed login page open on your computer for a certain period of time, you may notice that you have to log in twice. The first error says "CSRF Token".
Cross Site Request Forgery (CSRF) is caused by any page being left idle too long before someone tries to log in. "Idle" means there is not an action completed within the system (for example, pressing save on one of the client profile pages, pressing "Log In" on the login page).
It's a security measure Link2Feed has put in place to prevent other sites from trying to gain access to our server.
By logging in twice, you're telling the system that this isn't a malicious attempt to access the system while the page is left open. The second login is confirmation that this isn't just a passing attempt; you are a legitimate user trying to access the system.