I suspect that indicates that Olivier declared that the poll will end but did not provide a specific date. That may allow him to end the poll once all registered voters have cast their votes.
Indeed I didn’t specify the date to automaticvally end the poll as I couldn’t guess the date format to use so I am planning to close it manually. So I guess The poll ends . sounds like an empy variable
Regarding the internal error, unfortunately, I can’t really help