hey @nairpic, @Jeffrey101 @Ahmed_Yateem, can you provide more info:
- how are you trying to send fund ? are you using https://staking.harmony.one ?
- if yes can you try logout and login back to the portal
- if yes to 1) after doing 2) try to send your self (from/and to address is your ledger) 1 ONE. Make sure you are using the harmony ledger app
if you are not using staking.harmony.one or still have issue after the above you will have to check if you address is not blacklisted Technical Incident Report: Staking Logic Vulnerability and Exploitation - #15 by sophoah