{
}
You must receive the 1000 SPK for the masternode in a single transaction on your Control Wallet and wait for at least 1 confirmation.
If you already have the 1000 SPK but it came from multiple transactions, you can send the 1000 SPK back to yourself:
docker exec sparks-wallet sparks-cli sendfrom "" YoUrAdDr3Ss SPK
No such file or directory
Ensure the data
folder is writable for the container.