Rancher HA cluster

I am trying to set Rancher HA cluster with nginx load balancer in front of three nodes following the official documentation https://rancher.com/docs/rancher/v2.x/en/installation/ha/kubernetes-rke

Everything works fine till I run rancher helm charts. Everytime I get the following issue.

2019/07/02 19:43:53 [ERROR] Failed to connect to peer wss://10.42.2.5/v3/connect [local ID=10.42.0.6]: dial tcp 10.42.2.5:443: connect: connection timed out
Can anyone guide me in this issue?