ES 8.x https://www.elastic.co/guide/en/elasticsearch/reference/8.15/repository-s3.html is compatible with Service Account ES 7.x https://www.elastic.co/guide/en/cloud/current/ec-aws-custom-repository.html not compatible with Service Account. You need to use Instance Profile instead It is related to https://github.com/cloudbees/terraform-aws-cloudbees-ci-eks-addon/issues/56 More info here (CB internal link): https://cloudbees.slack.com/archives/C072X31M1DZ/p1727296700926479