Courses have completion tracking to help you keep track of where you are in the lesson and which components you have already done.
The course completion tracking can be affected by browser issues caused by browser extensions, Ad blockers, or cookies. If you experience issues with the tracking, please try disabling your browser extensions and clearing your cookies and cache before accessing components on the course website.
If you still have issues after doing the above, please let us know which specific lectures or components are remaining incomplete and we will investigate.