NO tab for forever friends event

iMac - the last event had no tab next to the store on the start up page to click to start the event. the new forever friends event does Not have a tab to check next to the store on the start up page either. Has anyone had this same issue? and are there any fixes other than downloading a mod? Is it a "bug"? Is there a way to begin the event once the game has started? Thanks for any suggestions.