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  1. I can't proceed with the lesson from a certain point
  2. I can't hear the lesson audio
  3. The screen suddenly turns white while taking the course

1. I can't proceed with the lesson from a certain point

If there are unanswered questions, you cannot proceed to the next page/stage.

Please make sure to answer all questions.

Also, if you are taking the course on a computer, some features may not work properly if your browser is not up to date.

Please check if your browser is up to date from the browser's options menu.

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2. I can't hear the lesson audio

Please check the following points.

[For both computer and app]