After 6 days on first deposit :
"balance" : 28049.81061100,
"newmint" : 0.00000000,
"stake" : 0.00000000,
"errors" : "WARNING: Checkpoint is too old. Wait for block chain to download, or notify
developers of the issue."
is the error the issue ?
Nope It just means the checkpoint server doesn't run 24h/24 but this doesn't affect at all how your wallet is working and you will get your stakes regularly