HTTPS not working when neo4j deployed on GCP

So I am trying to deploy neo4j on a VM on Google Cloud.
I used to create a VM instance that already has neo4j installed in it.

I was able to run the browser on HTTP with port 7474, but when I try it with port 7473, it does not load.

Things I have done:

  1. How do I enable remote HTTPS access with Neo4j 3.0.x - Knowledge Base
  2. Enable TCP port 7473 in the VM Firewall

Please let what else things are needed to be done to be able to run the browser on HTTPS, Thanks.