receive an error when using a values yaml file for group mapping

[fabiomarinetti]

Hi,

I am trying to install the chart with this command:

helm upgrade --install eks-auth eks-auth-iam-groups/eks-auth-iam-groups -n kube-system --set 'podAnnotations.iam\.amazonaws\.com/role=<my_role_arn>'  -f values.yaml

the file values.yaml has the simple structure:

mappings:
  admingroup: admins

unfortunately I get this error:

Error: UPGRADE FAILED: template: eks-auth-iam-groups/templates/cronjob.yaml:69:29: executing "eks-auth-iam-groups/templates/cronjob.yaml" at <include "helm-toolkit.utils.joinListWithComma" $value>: error calling include: template: eks-auth-iam-groups/templates/_helpers.tpl:63:20: executing "helm-toolkit.utils.joinListWithComma" at <.>: range can't iterate over pertica

No issue if I try the same setting using the --set option i.e.

--set 'mappings.admingroup=admins'