The last task inside the k8s service lab seems to be broken, using the following service definition:
apiVersion: v1
kind: Service
metadata:
name: webapp-service
spec:
type: NodePort
ports:
- targetPort: 8080
port: 8080
nodePort: 30080
selector:
name: simple-webapp
No application is shown when opening the simple-webapp-ui tab, please check the lab again.