is there a separate step in enabling istio in rancher, I am facing a 503 error when trying to access the page

Installing Istio into a downstream cluster managed by Rancher?

NO. Actually i couldn't acceess istio ingress using rancher desktop in my windows machine. it is having load balancer service. so i have changed it to NodePort service. now i am getting 503 error when try to access istio ingress using

localhost:<port>

.