This error occurs when you have connected to our patch server but you cannot download patch information.
What to do if you cannot log in to Hearthstone with your Battle.net account email on a mobile device
How to read and analyze WinMTR data in order to track down a potential connection issue.
How to read and analyze Pingplotter data in order to track down a potential connection issue.
Troubleshooting steps for communication and transmission errors.
How to check the linked status of your Twitch account.
Information about the Hearthstone Grandmasters drops on YouTube
How to see if your Microsoft Account and Battle.net Account have been correctly linked for Game Pass