FarmVille 2’s Requests envelope requires third-party cookies to function properly. If you are using Google Chrome, you can find out if your browser is blocking third-party cookies and data by following the steps listed below:

1.) Type chrome://settings/cookies into the address bar and press Enter to open your Privacy and Security settings.
2.) Choose a setting where third-party-cookies will not be blocked. This can be either Allow all cookies or Block third-party cookies in incognito from the options provided under the Cookies header.

3.) Reload FarmVille 2.