Please export your project and post it here.
I have no reason to believe a get Taglist will work if you have a nonexistent bucket.
See FAQ Section: Firebase for working samples.
The bus route tutorial is very clear. Notice how the bucket stated in the Designer Firebase attributes appeared in the data view, unlike yours.
Also, if you use a Notifier, pick one that requires an OK button to clear. I have never seen the Alert Notifier to work for me.
Your app will be easier to debug if you eliminate the Get Taglist wild goose chase from the process of retrieving the latest giveaway date.