Before you can withdraw from a stake account, it must have completed the cooldown process which is started by running the Deactivate-Stake command.
Once the cooldown process is complete, you can withdraw-state from your previosuly delegated stake-account.
~/Safecoin/target/release/safecoin withdraw-stake --withdraw-authority <KEYPAIR> <STAKE_ACCOUNT_ADDRESS> <RECIPIENT_ADDRESS> <AMOUNT> --fee-payer <KEYPAIR>