Google Kubernetes Engine how to get https?

Hi all, I’m a Kubernetes noob and using GKE to deploy a docker container that contains my API. I am using a load balancer to expose the api to the public. This is working great. The issue now is that I need to be on https. How do I do this? Whenever I try to use an ingress, it simply never works. - very frustrating.

The error that shows on the GKE dashboard for the ingress is: All backend services are in UNHEALTHY state

Any ideas how to accomplish the https goal?

Thanks so much.