CamilleWB probably no longer needed but I had the same issue, so posting for someone else who may bump into this again. In my case, the survey language (en-UK) and the default language of the library message (en-US) were different. You can either add a translation for the library message or switch the survey language itself.
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes.
Sorry, our virus scanner detected that this file isn't safe to download.