You've run out of Energy Points and therefore can not continue until you have more. They will turn back and you can continue making Choices once you regain at least one Energy Point. You can get more by either waiting for the Energy Bar to naturally recharge by one Energy Point (two if you're Premium) every hour, watching an ad up to 3 times a day if you're not Premium, becoming Premium, or activating an Extra Energy Token. Learn more about NC Tokens in the Kanrik Chronicles NC FAQ.