Some courses will have a due date, it is a good idea to check your courses for due dates to make sure you don't miss anything. Checking if a course has a due date is simple.
Select the Learner Workspace. Under Training on the left, select My Training.
In the list that appears, some courses will be marked as Optional and others as Required. Required courses may have a due date associated with them and are marked accordingly.
If you are past the due date for your course, you may find yourself locked out from completing it. In this case, you will want to contact your administrator or training manager for help.