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