kubernetes – Why am I seeing this ‘failed to download’ helm error when trying to upgrade a helm chart?

I am running a new relic chart in helm (from this repo -> github.com/newrelic/helm-charts/blob/master/charts/newrelic-logging, this is my output when running in my cluster:

helm list -A -n kube-system

NAME                            NAMESPACE.          REVISION.   UPDATED.      
newrelic-logging                kube-system         1           2021-06-23 18:54:54.383769 +0200 CEST   

STATUS.     CHART.                                  APP VERSION
deployed    newrelic-logging-1.4.7                  1.4.6  

I am trying to set a specific value here: github.com/newrelic/helm-charts/blob/master/charts/newrelic-logging/values.yaml

To do this I am using helm upgrade. I have tried:

helm upgrade newrelic-logging newrelic-logging-1.4.7 -f values.yaml -n kube-system
helm upgrade newrelic-logging-1.4.7 newrelic-logging --set updatedVal=0 -n kube-system

However with these commands I am seeing the output:

Error: failed to download "newrelic-logging-1.4.7"

and

Error: failed to download "newrelic-logging"

Why and how do I fix this? I have also ran helm repo update and it completes with no error messages.

Unfortunately I don’t see how this was initially setup as the previous employee has left the company and it’s too risky to stop and redeploy right now.