The program lessons are designed to be progressed one day at a time. Once a day/module is completed, the next one will unlock on midnight.
In case you are using multiple devices, please note we currently do not support automated sync between more devices. In that case you need to manually sync the second device to make sure all the completed lessons are marked accordingly.
Also make sure it's passed midnight after you completed the previous module/day. For example if you completed all the lessons on the 13th of July at 02:30AM, the next day/module will not be available until 14th of July at 00:00AM.