Why am i unable to unstake SOL?

I've been trying to unstake my SOL holdings, but I'm encountering difficulties. Could you help me understand why I'm unable to do so? I've followed the standard procedures, but the transaction seems to be getting stuck or rejected. I've ensured that my SOL is fully vested and I've waited for the appropriate unlock period. Is there a technical issue with the network or is there something else I need to consider? I'd appreciate any guidance you can provide to resolve this matter. Thank you.