# I can't access my questionnaire, error 400, what should I do?

You are encountering a 400 error with the display `The CSRF token could not be verified` when you want to access a course start or end questionnaire.

To bypass this blocking event, please click on the link at the bottom of the page:

 ![](https://support.fun-edu.fr/api/files.get?sig=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJrZXkiOiJ1cGxvYWRzLzE0NGZkNTM4LTgwYjAtNDI0NS05Y2U0LTEyOGExMWRkNjI4Mi8wODYxODg0ZC1kOTBkLTQxYjMtOTM3Yy0zYjQ0NjhmZDllNTkvaW1hZ2UiLCJ0eXBlIjoiYXR0YWNobWVudCIsImlhdCI6MTc4OTg5NzUwMCwiZXhwIjoxNzg5OTgzOTAwfQ.QH0PoXJNN0M39iHSQG_RS6hc0mitIqDPBjXtVk85_Og)

If this link does not appear, please contact us via our [contact form](/doc/contact-us-dZpx4sureu), making sure to mention the field with the URL of the page concerned.