Install Redash with Kubernetes

Hi everyone.
I am currently trying to install redash with Kubernetes using Helm.
I am guiding myself through the following link: https://github.com/getredash/contrib-helm-chart

However, I always get the following error:
Error: failed to download “stable / redash”

I am using Helm version 3.

helm repo list
NAME URL
stable https://kubernetes-charts.storage.googleapis.com

What can I be doing wrong so I can’t install redash?

Any solution for this problem?