Decryption key is invalid or missing. Please uninstall and reinstall.
Troubleshooting steps for this error in Diablo III
Information on error message BLZBNTBGS8000001C.
How to redeem a code for a game, a product, or Blizzard Balance
How to resolve this problem when downloading an update
Instructions on getting Blizzard games to play on your TV.
This error means the Battle.net Agent (the process that installs and patches our games) couldn't stream necessary files.
The Battle.net desktop app is trying to connect to an invalid or nonexistent server.