nacos 1.4.0版本 单机模式下报错

1.4.0版本 单机模式下 错误：code:503,msg:server is DOWN now, please try again later

protocol-raft日志文件中报错：

java.lang.IllegalArgumentException: Blank leader
at com.alipay.sofa.jraft.util.Requires.requireTrue(Requires.java:85)
at com.alipay.sofa.jraft.RouteTable.updateLeader(RouteTable.java:181)
at com.alipay.sofa.jraft.RouteTable.refreshLeader(RouteTable.java:264)
at com.alibaba.nacos.core.distributed.raft.JRaftServer.refreshRouteTable(JRaftServer.java:501)
at com.alibaba.nacos.core.distributed.raft.JRaftServer.lambda$createMultiRaftGroup$1(JRaftServer.java:276)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:832)