Every day at the following time, Knight's Missions that can be accepted from 'Licorice' reset. 

PST: 10:00PM / PDT: 11:00PM

UTC: 06:00

GMT+9: 15:00

When these missions reset, all previously accepted missions will disappear. 

Even if you compelte the Knight's Missions, if this reset occurs, you will not be able to claim the rewards. Please make sure that you collect both the mission and bonus rewards before the reset.