been randomly getting this recently . . .

[2017-11-08 07:18:40] Starting on stratum+tcp://asia.lyra2z-hub.miningpoolhub.com:20581
[2017-11-08 07:18:40] NVML GPU monitoring enabled.
[2017-11-08 07:18:40] NVAPI GPU monitoring enabled.
[2017-11-08 07:18:40] 6 miner threads started, using 'lyra2z' algorithm.
[2017-11-08 07:18:40] Failed to get extranonce1
[2017-11-08 07:18:40] Stratum subscribe answer id is not correct!
[2017-11-08 07:18:40] JSON-RPC call failed: (unknown reason)
[2017-11-08 07:18:40] ...retry after 30 seconds
[2017-11-08 07:18:41] API open to the network in read-only mode on port 4068
[2017-11-08 07:19:10] Failed to get extranonce1
[2017-11-08 07:19:10] Stratum subscribe answer id is not correct!
[2017-11-08 07:19:10] JSON-RPC call failed: (unknown reason)
[2017-11-08 07:19:10] ...retry after 30 seconds

other rigs works well some random after quitting n restrting miner, it goes back to normal, some just don't & keeps on going on & on.

suprnova works fine.