Need assistance getting istio issues

warning envoy config gRPC config for type.googleapis.com/envoy.config.route.v3.RouteConfiguration rejected: Proto constraint validation failed (RouteConfigurationValidationError.VirtualHosts[0]: embedded message failed validation | caused by VirtualHostValidationError.Routes[0]: embedded message failed validation | caused by RouteValidationError.Route: embedded message failed validation | caused by RouteActionValidationError.WeightedClusters: embedded message failed validation | caused by WeightedClusterValidationError.Clusters: value must contain at least 1 item(s)): name: “https.443.https.xxx-th-svc-gw.xxx-th-svc”

Istioctl RDS STALE (Never Acknowledged)

Its a validation error. you need to correct the route information provided in virtual service.