Closed PHP Error for Voting

IGN: JxDCrystal
Problem: unable to vote
Details: (this issue isn't specifically relevant to me, but I'm posting on behalf of someone else)

For some reason, my girlfriend receives the following error message while trying to vote:

"A PHP ERROR WAS ENCOUNTERED
Severity: Notice

Message: Undefined index: gtcookie

Filename: views/site_details.php

Line Number: 130"

She recently started playing the game a few days ago and we're trying to get some nx on her account. I know that there can only be one vote per wifi (household), so we have tried using mobile data to vote occasionally (max once per 24h of course), but we keep receiving this error. Does this have to do with the voting whitelist? (I forgot how that process worked).

Thanks a lot!

 

would that solve the error? also, i believe my household already has an approved voting whitelist application (both my brother and I play). would it be acceptable to have three accounts from the same household?

for now, we have just decided to alternate voting days