Possible error mining XMR with NsGpuCNMiner

[oskoa]

Pool: https://monero.crypto-pool.fr
Miner: NsGpuCNMiner 11.3
Wallet: Directly from HitBTC
Hardware: x2 RX 470
Bat Config: NsGpuCNMiner.exe -xpool stratum+tcp://xmr.crypto-pool.fr:3333 -xwal My moneroWallet -xpsw x

and i get for each line of CMD window the following:

ID:4 Jsonrpc 2.0 error code 1 message Lowdificuldyshare

Is it an error? My minning its ok?

thanks