Trouble configuring helm chart version upgrade

[olespagnon-vdm]

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I'm trying to configure Renovate to monitor and create PR based on chart versions provided in Terraform value files.
I'm using CustomManager:Regex to achieve this. But Renovate cannot find the packages.
Here is my Renovate config :

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
    "config:recommended"
  ],
  "customManagers": [
    {
      "customType": "regex",
      "managerFilePatterns": [
        "/ekscluster-(?:develop|prod)\\.tfvars$/"
      ],
      "matchStrings": [
        "argocd_chart_version\\s*=\\s*\"(?<currentValue>[^\"]+)"
      ],
      "depNameTemplate": "ArgoCD chart",
      "autoReplaceStringTemplate": "argocd_chart_version = {{{newValue}}}",
      "datasourceTemplate": "helm",
      "packageNameTemplate": "argo/argo-cd",
      "registryUrlTemplate": "https://argoproj.github.io/argo-helm"
    },
    {
      "customType": "regex",
      "managerFilePatterns": [
        "/ekscluster-(?:develop|prod)\\.tfvars$/"
      ],
      "matchStrings": [
        "metrics_server_chart_version\\s*=\\s*\"(?<currentValue>[^\"]+)"
      ],
      "depNameTemplate": "Metrics server chart",
      "autoReplaceStringTemplate": "metrics_server_chart_version = {{{newValue}}}",
      "datasourceTemplate": "helm",
      "packageNameTemplate": "metrics-server/metrics-server",
      "registryUrlTemplate": "https://kubernetes-sigs.github.io/metrics-server/"
    },
    {
      "customType": "regex",
      "managerFilePatterns": [
        "/ekscluster-(?:develop|prod)\\.tfvars$/"
      ],
      "matchStrings": [
        "alb_chart_version\\s*=\\s*\"(?<currentValue>[^\"]+)\""
      ],
      "depNameTemplate": "ALB Controller chart",
      "autoReplaceStringTemplate": "alb_chart_version = {{{newValue}}}",
      "datasourceTemplate": "helm",
      "packageNameTemplate": "eks/aws-load-balancer-controller",
      "registryUrlTemplate": "https://aws.github.io/eks-charts"
    }
  ]
}

Here is a snippet of my TF_VARS:

# -> ARGO CD
argocd_chart_version        = "5.13.8"
# <-

here is the error of Renovate in the PR :
Failed to look up helm package argo/argo-cd

Am I missing something completely ?

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[lindhe]

I also got this error, starting a few days ago:

Failed to look up helm package sealed-secrets: no-result

Turns out SealedSecrets has changed Helm chart repo: bitnami/sealed-secrets#1983

What helped me determine that was that I tried to build the manifests manually and got a similar error. That made me stop focusing on Renovate config as the culprit.