Checking a metric and error occurred

Hi Hanna, can you please provide additional information about this error you encountered?

What is the error message or number, and what action did you perform when the error occurred ( for example: submit an answer, upload a source, clicking the "Yes I checked button). If you can provide the link to the page where the error occurs will also be helpful.

Closed ticket because the user reported via email that the error was temporal and she completed the checking exercise.