

You’re likely looking for this docs section for Caddy. The failure is the automated request to populate Caddy’s root CA cert to the host system, but obviously failed as it doesn’t have root permissions. As the docs state, if you intend to use the local HTTPS functionality of Caddy, you can manually run caddy trust
privileged in order to populate the Caddy root CA cert manually. If you intend to disable the local HTTPS functionality (such as if you’re running Caddy behind a http reverse proxy), you can ignore the mail message.
Probably either wait for some other provider to build helm charts, roll your own k8s YAML for Redis based on the helm chart and with standard Redis OCI images, or migrate to a different, but compatible service like DragonflyDB if you don’t need modern Redis features (not suggesting Valkey because they are also entrenched in Bitnami and offer it as the official chart source).