On November 13, 2020 the standard helm chart repository at storage.googleapis.com became unsupported.
This may break older versions of helm that have this repository built in (especially helm 2).
Migration to new stable repository can be done as follows:
# for Helm 2 (e.g. 2.14.3) helm init --client-only --skip-refresh helm repo add stable https://charts.helm.sh/stable helm repo update stable