Error uninstall rancher helm

Hi team, Uninstalled rancher with helm using ./helm uninstall rancher rancher-stable/rancher --namespace cattle-system . But a “rancher-post-delete-hpphg” pod stays on container creation and shows this error "Warning FailedCreatePodSandBox 21s (x38 over 8m26s) kubelet (combined from similar events): Failed to create pod sandbox: rpc error: code =Unknown desc=Could not configure network for sandbox “xxxxx”: Failed to get cluster information: Connection is not authorized: Unauthorized.Please can someone help me?

I’m not familiar this, but looks l like rancher-post-delete didn’t (or got deleted before rancher-post-delete container ) have required service account to manage the cleanup operation successfully ,
You can take a look at:cleanup script