The following steps often help:
1. Close all internet browsers and re-open the website.
2: Refresh the website (Ctrl + F5).
Still doesn’t work? Try using a different browser (we suggest the latest version of Google Chrome). We recommend you set your browser to enable local storage and cookies while playing on our site.
This allows you to to use features like logging in and saving your game progress. If also all previous steps won’t work, you can clear your cache memory (Ctrl+Shift+Delete, and select everything except the passwords for verification).
Please, be aware that, if you are playing a casual game, by doing that you will lose your game progress. If you are playing a social game, you can try this procedure with no risk of losing progress.