ArgoCD GKE Azure Auth using OIDC failed

[CuervoEC]

Hi. I've deployed ArgoCD in a GKE cluster and I'm trying to configure Entra ID App Registration Auth using OIDC. I've followed the documentation step by step, but this error appears when I try to log in:

failed to generate client assertion: AZURE_FEDERATED_TOKEN_FILE env variable not found, make sure workload identity is enabled on the cluster

I'm not sure what is missing since I'm trying to use Workload Identity Federation.

ArgoCD was deployed using Terraform, here's a snipped of the config for the Helm resource I used:

      configs = {
        params = {
          # Server configuration
          "server.insecure" = true
        }
        credentialTemplates = {}
        cm = {
          "url" = "https://${local.argocd_domain}/"
          "cluster.config" = <<-YAML
            execProviderConfig:
              command: "gke-gcloud-auth-plugin"
              apiVersion: "client.authentication.k8s.io/v1beta1"
              installHint: "Install gke-gcloud-auth-plugin for use with kubectl"
            YAML

          "oidc.config" = <<-YAML
            name: Azure
            issuer: https://login.microsoftonline.com/${local.argo_cd_secrets.ARGO_CD_MS_TENANT_ID}/v2.0
            clientID: ${local.argo_cd_secrets.ARGO_CD_MS_CLIENT_ID}
            azure:
              useWorkloadIdentity: true
            requestedIDTokenClaims:
              groups:
                  essential: true
                  value: "SecurityGroup"
            requestedScopes:
              - openid
              - profile
              - email
            YAML
        }

My first guess probably is the Cluster issuer URL, that is configured with this value:
https://container.googleapis.com/v1/projects/<my-project>/locations/<my-region>/clusters/<my-cluster>

Any suggestion, tip, idea or documentation I probably miss is welcome. Thanks!