while using suprnova pool ,i am getting error like

 cannot find block data:
{"id":null,"method":"mining.notify","params":["13b2","29737524b6ef5d2a924558e5fc4c65a0c3e65de677d558fcbb8e2ef6ba97a0b0","01000000175b9659010000000000000000000000000000000000000000000000000000000000000 000ffffffff20036fa60004175b965908","0d2f6e6f64655374726174756d2f000000000100a2941a1d00000023210341e0dfc1dd662d56e76 63058dd74172255f698838c5bf5f9fd4ddf4730ca8a97ac00000000",[],"00000007","1b031181","59965b17",true]}
cannot convert blob data
 Job timeout, disconnect, retry in 20 sec...

using gpu miner:Claymore.CryptoNote.GPU.Miner.v9.7.Beta.-.POOL

please advise what is wrong?