Ledger Live version 1.12 brings many bug fixes including a fix for QTUM and XST. Please update Ledger Live to version 1.12 using the in-app update mechanism or by downloading it.
If you previously encountered difficulties using QTUM or XST:
- Uninstall the QTUM or XST app from your device using the Manager.
- Uninstall the Bitcoin app from your device.
- Install the Bitcoin app so you have version 1.3.11.
- Install the new QTUM app and/or XST app.
You can now use QTUM Segwit addresses and send XST transactions.
Feel free to contact Ledger Support in case you require further assistance.