MongoDB - Amazon EC2 Connection Issue

While connecting MongoDB instance from AWS EC2, I am getting the below error,

If anyone came across this issue, please help me.
**********************************

MongoDB shell version v4.4.3
connecting to: mongodb://t1.singlenode-mongodb:27017/?authSource=admin&compressors=disabled&gssapiServiceName=mongodb&replicaSet=abcsreplicaset01

{"t":{"$date":"2020-9-21T11:04:43.912Z"},"s":"I", "c":"NETWORK", "id":4333208, "ctx":"ReplicaSetMonitor-TaskExecutor","msg":"RSM host selection timeout","attr":{"replicaSet":"abcsreplicaset01","error":"FailedToSatisfyReadPreference: Could not find host matching read preference { mode: \"nearest\" } for set abcsreplicaset01"}}

Error: connect failed to replica set abcsreplicaset01/t1.singlenode-mongodb:27017 :

connect@src/mongo/shell/mongo.js:374:17

@(connect):2:6

exception: connect failed

exiting with code 1
**************************************