After you submit the form on poll creation page, a PHP warning is shown as follows:
Notice: Undefined index: jump-text in /var/www/html/extensions/SecurePoll/includes/pages/CreatePage.php on line 971
The root cause is that the election parameter jump-text is only available on the poll translation page (not on the poll creation page). It makes perfect sense because the jump text is different for each language (it is supposed to be translated).
Solution would be to remove the reference to jump-text in the poll creation page, where it doesn't belong and is not used.