hello!Getblocktemplate have a bug,sometimes will return:
{"result":null,"error":{"code":-1,"message":"CreateNewBlock: TestBlockValidity failed: , Transaction check failed (tx hash 2d52b9ea9b6afe902f04e50b783076c6d5c778d2e320175b76bfcbfe1fda212e)  (code 0)"},"id":null}

Zcoin wallet v0.13.3.1 have a bug, when run for some hours, the getblocktemplate command will return "CreateNewBlock: TestBlockValidity failed: bad-txns-BIP30 (code 16) (code -1)", must restart the wallet to solve this problem.