The Battle.net desktop app is trying to connect to an invalid or nonexistent server.

Information on how to collect rewards from the track in Hearthstone, including from the Tavern Pass.

What to do if your Rewards Track isn't advancing

The Hearthstone Tavern Pass is a temporary product that lasts until the launch of the next expansion

What to do if you didn't get the time to claim your rewards before the season ended.

What to do if you are unable to use a payment method that you've used in the past.

How rewards from quests work in Hearthstone

The Blizzard Update Agent could not install in the specified folder location.

What to do if you chose the wrong Tavern Pass Reward.

How to resolve this error in Hearthstone