The course has frozen or page loads forever

Page is not responding due to a long-running script.

  1. Please ensure that you meet the minimum requirements as seen here.
  2. Try a hard refresh of your browser using the following command: Ctrl + F5 (Windows), Command + shift + F5 (Macintosh). Please note that hard refresh is unavailable on mobile devices.
  3. Refresh your cache using the instructions available at

Note: Your progress may be reset when performing the above troubleshooting methods. Using the menu on the left-hand side of the player (PC, Mac) or from the slide out menu (mobile) select the topic that you would like to continue from and resume your pre-learning. 


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