You will need to go back in to the course and resume where you left off, you will probably find that there is a section of the course that you have by-passed (usually within the Symbols section).
You must open all arrows, & information signs, play all videos and click on all rotating cricket balls within the E-Learning module. If you do not the course will not show as completed and you will be unable to progress.
Once the course is complete a tick will appear in the box to the right of Basics of Scoring within the E-Learning Module and you will then be able to progress to the final assessment section and then access your certificate. Please see screenshot below of an example of a completed online course with all of the boxes ticked: