Some surveys become popular very quick. It's possible that a lot of our members are trying to complete the survey at the same time and there is too much traffic on our servers.
It is also possible that the survey is affected by a brief technical glitch or that you tried to take this survey before (please remember most of our survey invites can only be access one time).
In either case, please try again after an hour or so. If by then you are still experiencing issues, please contact us again.