Just checked and it says "zero pumpkins served this year" so it isn't able to connect right from the get go!
I don't have any custom firewall set up, just whatever linux has by default.
I have not played in previous years, just purchased it this year.
Let me know if there is a way to get a log or something to you to help.
And no worried about any trouble! This is pretty normal for us linux users! We submit the most bugs!