Running with gitlab-runner 15.4.0~beta.5.gdefc7017 (defc7017)
  on green-3.shared.runners-manager.gitlab.com/default Jhc_Jxvh
section_start:1665584888:resolve_secrets
Resolving secrets
section_end:1665584888:resolve_secrets
section_start:1665584888:prepare_executor
Preparing the "docker+machine" executor
Using Docker executor with image registry.gitlab.com/nbdkit/libnbd/ci-alpine-315:latest ...
Authenticating with credentials from job payload (GitLab Registry)
Pulling docker image registry.gitlab.com/nbdkit/libnbd/ci-alpine-315:latest ...
WARNING: Failed to pull image with policy "always": Error response from daemon: manifest for registry.gitlab.com/nbdkit/libnbd/ci-alpine-315:latest not found: manifest unknown: manifest unknown (manager.go:235:0s)
section_end:1665584896:prepare_executor
ERROR: Job failed: failed to pull image "registry.gitlab.com/nbdkit/libnbd/ci-alpine-315:latest" with specified policies [always]: Error response from daemon: manifest for registry.gitlab.com/nbdkit/libnbd/ci-alpine-315:latest not found: manifest unknown: manifest unknown (manager.go:235:0s)