There are several possible reasons why you see a "server error' message. Try the solution below to trouble shoot the issue: 

1) Click the "back to progress" button and click the language course again

2) Log in again

3) Update your browser and make sure you're using the latest version

If none of the solution works, please get in contact with us with a screenshot and let us know what device or computer you're using with as much information as possible.

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