Error code 18 AuthenticationFailed when add Secondary in replica set MongoDB - mongodb

Question

I received the error below:
{"t":{"$date":"2022-12-24T11:00:54.895+00:00"},"s":"I", "c":"NETWORK", "id":4712102, "ctx":"ReplicaSetMonitor-TaskExecutor","msg":"Host failed in replica set","attr":{"replicaSet":"{Replset_name}","host":"{VPS_IP}:27019","error":{"code":18,"codeName":"AuthenticationFailed","errmsg":"Authentication failed."},"action":{"dropConnections":false,"requestImmediateCheck
That error is shown in mongod.log when I add Secondary in the existing replica set MongoDB between different docker containers in 2 server machines.
My replica set structure includes the following:
Primary on VPS1_DO:container1 (actived) (same overlay-network)
Secondary1 on VPS1_DO:container2 (actived) (same overlay-network)
Secondary2 on VPS2_Azure:container1 (error)
Details in rs.status()
"members" : [
{
"_id" : 0,
"name" : "10.5.0.11(staticIP-container1):27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 258904,
"optime" : {
"ts" : Timestamp(1672026076, 1),
"t" : NumberLong(67)
},
"optimeDurable" : {
"ts" : Timestamp(1672026076, 1),
"t" : NumberLong(67)
},
"optimeDate" : ISODate("2022-12-26T03:41:16Z"),
"optimeDurableDate" : ISODate("2022-12-26T03:41:16Z"),
"lastAppliedWallTime" : ISODate("2022-12-26T03:41:16.739Z"),
"lastDurableWallTime" : ISODate("2022-12-26T03:41:16.739Z"),
"lastHeartbeat" : ISODate("2022-12-26T03:41:17.962Z"),
"lastHeartbeatRecv" : ISODate("2022-12-26T03:41:18.521Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncSourceHost" : "10.5.0.12:27017",
"syncSourceId" : 1,
"infoMessage" : "",
"configVersion" : 17,
"configTerm" : 67
},
{
"_id" : 1,
"name" : "10.5.0.12(staticIP-container2):27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 589529,
"optime" : {
"ts" : Timestamp(1672026076, 1),
"t" : NumberLong(67)
},
"optimeDate" : ISODate("2022-12-26T03:41:16Z"),
"lastAppliedWallTime" : ISODate("2022-12-26T03:41:16.739Z"),
"lastDurableWallTime" : ISODate("2022-12-26T03:41:16.739Z"),
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"electionTime" : Timestamp(1671767185, 1),
"electionDate" : ISODate("2022-12-23T03:46:25Z"),
"configVersion" : 17,
"configTerm" : 67,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 2,
"name" : "178.128.xx.xxx(IP-VPS):27019",
"health" : 0,
"state" : 6,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"optime" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"optimeDurable" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"optimeDate" : ISODate("1970-01-01T00:00:00Z"),
"optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
"lastAppliedWallTime" : ISODate("1970-01-01T00:00:00Z"),
"lastDurableWallTime" : ISODate("1970-01-01T00:00:00Z"),
"lastHeartbeat" : ISODate("2022-12-26T03:41:17.427Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"authenticated" : false,
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : -1,
"configTerm" : -1
}
],
And I ensure that I follow some rules:
Same MongoDB version (5.0.6)
Same mongod.conf file (same replSet name)
Same keyFile and chmod 400 (read-only)
Can ping each order (open port ICMP inbound)
Many thanks !!