Rancher - Unable to import clusters

I have installed rancher with helm chart approach on EKS cluster using this link. https://rancher.com/docs/rancher/v2.6/en/installation/install-rancher-on-k8s/#install-the-rancher-helm-chart with Rancher Generated TLS Certificate and manually had to edit Ingress to add IngressClass:nginx. As a pre-req, I also deployed ingress controller using Step 5, https://rancher.com/docs/rancher/v2.6/en/installation/resources/k8s-tutorials/amazon-eks/. I did not setup route53 , but using LoadBalancer Domain as is to login to rancher. Am able to login rancher, but unable to create/import existing clusters. Goes into provision mode and on Condition tabs shows "But get message <[Disconnected] Cluster agent is not connected", "Waiting For API to be available", " [Error] Error while applying agent YAML, it will be retried automatically: exit status 1, Unable to connect to the server: remote error: tls: internal error"