Steps to replicate the issue (include links if applicable):

• LocalSettings.php config:

wfLoadExtension( 'SecurePoll' );
$wgGroupPermissions['sysop']['securepoll-create-poll'] = true;
$wgGroupPermissions['electionadmin'] = [];
$wgSecurePollSingleTransferableVoteEnabled = true;

• Create a histogram range poll with the following settings

• Wait until it opens
• Try to vote

What happens?:

What should have happened instead?:

• Vote page loads

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):