通过遵循https://docs.corda.r3.com/running-a-notary-cluster/introduction.html中的文档，启动作为percona集群一部分的corda企业公证节点时，出现以下错误。如何将分布式公证人的私钥添加到证书文件夹。此外，在build.gradle中无法识别serviceLegalName，请帮助我如何添加它。internal.Node.run-节点启动期间的异常
java.lang.IllegalArgumentException：无法在密钥存储库中找到节点所属的分布式公证人的身份
at net.corda.node.internal.AbstractNode.obtainIdentity(AbstractNode.kt:917) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.AbstractNode.updateNodeInfo(AbstractNode.kt:413) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.AbstractNode.access$updateNodeInfo(AbstractNode.kt:126) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.AbstractNode$start$6.invoke(AbstractNode.kt:291) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.AbstractNode$start$6.invoke(AbstractNode.kt:126) ~[corda-node-3.2.jar:?]
at net.corda.nodeapi.internal.persistence.CordaPersistence.inTopLevelTransaction(CordaPersistence.kt:173) ~[corda-node-api-3.2.jar:?]
at net.corda.nodeapi.internal.persistence.CordaPersistence.transaction(CordaPersistence.kt:158) ~[corda-node-api-3.2.jar:?]
at net.corda.nodeapi.internal.persistence.CordaPersistence.transaction(CordaPersistence.kt:136) ~[corda-node-api-3.2.jar:?]
at net.corda.nodeapi.internal.persistence.CordaPersistence.transaction(CordaPersistence.kt:142) ~[corda-node-api-3.2.jar:?]
at net.corda.node.internal.AbstractNode.start(AbstractNode.kt:289) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.Node.start(Node.kt:387) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.EnterpriseNode.start(EnterpriseNode.kt:181) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.NodeStartup.startNode(NodeStartup.kt:270) ~[corda-node-3.2.jar:?]
at net.corda.node.internal.NodeStartup.run(NodeStartup.kt:160) [corda-node-3.2.jar:?]
at net.corda.node.Corda.main(Corda.kt:25) [corda-node-3.2.jar:?]
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