Can't complete a lesson / "Couldn't display this lesson" (reference code) appears
Causes and fixes when completing a lesson (e.g. after passing the quiz) shows an error screen or a reference code.
[When this screen appears]
Right after you answer the quiz correctly and press "Complete this lesson", you may see:
- "Couldn't display this lesson"
- "Reference code: 1234567890" (the number changes each time)
[Try this first]
- 1.Press "Reload" on the screen. It is usually a temporary display issue that clears on reload.
- 2.If it persists, reload the whole page in your browser.
- 3.Your quiz pass is already recorded, so you do not need to retake it. If only the completion fails after passing, see below.
[If you can't complete a lesson right after opening it]
To prevent lessons from being marked complete by clicking alone without reviewing the content, each lesson has a minimum "time open" guideline (from a few tens of seconds up to about 3 minutes).
- If it is not met, you'll see "Please review the lesson before completing (about N more minute(s))".
- Keep the lesson open a little longer, then press "Complete this lesson" again.
- If you have passed the quiz, this wait is not required — passing the quiz itself counts as proof of engagement.
[If it still doesn't resolve]
Note the reference code shown (e.g. "Reference code: 1234567890") and let your course administrator or support know. The reference code lets us locate the corresponding record.
[Related]
Example
Pass the quiz -> "Complete this lesson" -> error screen -> press "Reload" -> completion is recorded.
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