Answer
Check the username and password stored in the jfrog-artifactory-api-key file inside the ifsroot\config\secrets directory — a 403 Forbidden fetching the Helm chart index at this specific step is commonly caused by incorrect or stale credentials in that file. If the credentials are correct, also check that all the URLs required for a remote deployment (including the JFrog Artifactory domain) are actually allowed through your outbound firewall/proxy, since a blocked URL can produce the same kind of fetch failure as a credentials problem.