Docker Compose deploy fails because the image tag is empty
Error recorded 1 times in PanelAlpha Engine deploys on Docker Compose. 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
WhereDocker Compose
StatusObservedOur team will look into this soon, verify the cause and try to fix it in an upcoming release.
Why it happens
The Compose configuration references several environment variables that were not provided. The missing TAG variable produces an image name ending in a colon, such as ghcr.io/venil7/<account>:. Docker rejects this as an invalid image reference before the application can start.
What the log looks like
Deploy log
Starting application (docker compose up -d)time="2026-09-14T17:49:06Z" level=warning msg="The \"TAG\" variable is not set. Defaulting to a blank string."unable to get image 'ghcr.io/venil7/<account>:': Error response from daemon: invalid reference formatDeploy failed: Failed to start app