Docker Compose service dependency is undefined
Error recorded 1 times in PanelAlpha Engine deploys on Dockerfile. The deploy log below is the recorded failure output.
TypeErrorAn error that occurred in the deployed application. It is not necessarily a PanelAlpha Engine error, but we keep working on improvements so you run into fewer of them.
Seen1 times
WhereDockerfile
StatusObservedOur team will look into this soon, verify the cause and try to fix it in an upcoming release.
Why it happens
The Dockerfile deployment reached the Compose startup step, but the app service depends on traefik, which is not defined in the Compose project Engine started. The missing ACME_EMAIL variable is a warning, but the undefined service makes the Compose file invalid. This may result from Compose profiles, service filtering, or a mismatch between depends_on and the declared service name.
What the log looks like
Deploy log
Starting application (docker compose up -d)time="2026-09-10T23:17:30Z" level=warning msg="The \"ACME_EMAIL\" variable is not set. Defaulting to a blank string."service "app" depends on undefined service "traefik": invalid compose projectDeploy failed: Failed to start app