Farm Heroes won’t open

Thanks @wampus👍

If the game app is up to date an the issue is persisting, you might have to reinstalled the game app. It usually fixes most issues (please note that any progress on the mobile device that has not been synchronized with Facebook/King account at this stage will be lost.

However, all the progress that is currently saved on Facebook/King account can easily be retrieved, once you have reconnected the device successfully). 

Regrettably, you will lose any saved boosters and messages.

Hope this helps