Can't complete a lesson / "Couldn't display this lesson" (reference code) appears

[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. 1.Press "Reload" on the screen. It is usually a temporary display issue that clears on reload.
2. 2.If it persists, reload the whole page in your browser.
3. 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]

• How to take an e-learning course -> #HR-021 / #HR-141
• Training history and certificates -> #HR-012
• About error screens such as "The app has been updated" -> #WSYS-INTERNAL