Sorry but that link doesn't help anything. The forum software shortens the link. Put it into a code section, that should avoid the shortening.
But it would be important to know if your survey with tokens is set to anonymous. In this case there whould be no access to the token on purpose.
Help us to help you!
Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.