This article describes UNKNOWN_ERROR (0x5515) in Ledger live and how to troubleshoot it.
This error might be triggered if your Ledger device is locked while using Ledger Live.
Ledger Live will return: Something went wrong. Please reconnect your device - UNKNOWN_ERROR (0x5515).
- Unlock your Ledger device using your PIN code.
- Start the action in Ledger Live again.